Standardized Admissions Tests English 6 Interactive Flashcard Decks
Complete AP Environmental Science (APES), AP Microeconomics & AP Macroeconomics Study Guide
High-yield AP Environmental Science (APES), AP Microeconomics, and AP Macroeconomics flashcards covering ecosystems, biogeochemical cycles, energy resources, climate change, supply and demand, elasticity, market structures, GDP, AD-AS, fiscal policy, and central bank monetary policy
Interactive Premade Curricula
AP Environmental Science (APES), AP Microeconomics & AP Macroeconomics Flashcard Decks (6)
Select any deck below to study cards with active recall, audio pronunciation, and FSRS spaced repetition, or filter by difficulty level.
Foundational EN → EN
APES: Ecosystems, Biodiversity, Biogeochemical Cycles & Population Ecology
Foundational EN → EN
APES: Earth Systems, Energy Resources, Atmospheric Pollution & Climate Change
Intermediate EN → EN
AP Microeconomics: Supply, Demand, Elasticity, Consumer/Producer Surplus & Production Costs
Intermediate EN → EN
AP Microeconomics: Perfect Competition, Monopoly, Oligopoly, Factor Markets & Market Failure
Comprehensive Active-Recall Curriculum: High-yield AP Environmental Science (APES), AP Microeconomics, and AP Macroeconomics flashcards covering ecosystems, biogeochemical cycles, energy resources, climate change, supply and demand, elasticity, market structures, GDP, AD-AS, fiscal policy, and central bank monetary policy. Practice 6 progressive flashcard decks (192 cards total) spanning foundational principles (
basic), intermediate problem-solving (intermediate), and advanced exam mastery (advanced).
Why Active Recall & Spaced Repetition Work for This Exam
Mastering AP Environmental Science (APES), AP Microeconomics & AP Macroeconomics requires retrieving precise definitions, formulas, diagnostic rules, and edge-case distinctions under timed pressure. Passive re-reading creates an illusion of competence; active recall (testing yourself before viewing the answer) and spaced repetition strengthen long-term synaptic retrieval pathways.
| Study Phase | Decks Covered | Target Mastery Level | Daily Active-Recall Protocol |
|---|---|---|---|
| Phase 1: Foundations (Weeks 1–2) | Decks 1 & 2 (Basic) |
90%+ Instant Recall | 32 new cards/day + full review of missed concepts |
| Phase 2: Application (Weeks 3–5) | Decks 3 & 4 (Intermediate) |
Multi-step synthesis | 32 new cards/day + interleaved Phase 1 review |
| Phase 3: Exam Mastery (Weeks 6–8) | Decks 5 & 6 (Advanced) |
Timed exam readiness | Full 192-card spaced-repetition rotation + weak-spot drills |
Deck 1: APES: Ecosystems, Biodiversity, Biogeochemical Cycles & Population Ecology (32 Cards — Basic)
What this deck covers: High-yield AP Environmental Science Units 1–3 review covering terrestrial and aquatic biomes, primary productivity (GPP/NPP), the 10% trophic pyramid, carbon/nitrogen/phosphorus/hydrologic cycles, island biogeography, ecological succession, and population dynamics.
| High-Yield Prompt / Question | Core Concept & Mechanism | Exam Application & Details |
|---|---|---|
| How do Gross Primary Productivity (GPP), Net Primary Productivity (NPP), and cellular respiration ($R$) relate mathematically, and which ecosystems have the highest NPP? | $\text{NPP} = \text{GPP} - R$, where GPP is the total rate of photosynthesis by autotrophs and $R$ is the energy autotrophs use for their own cellular respiration. | Estuaries, swamps/marshes, tropical rainforests, and coral reefs have the highest NPP per unit area, while open oceans contribute a large total share only because of their vast surface area. |
| How do the First and Second Laws of Thermodynamics explain the 10% Rule across trophic levels in an ecological pyramid? | The First Law states that energy cannot be created or destroyed (solar energy is converted to chemical energy) | the Second Law states that every energy transfer increases entropy, losing ~90% of energy as metabolic heat. Only ~10% of chemical energy is transferred from one trophic level to the next (e.g., 10,000 kcal primary producers $\rightarrow$ 1,000 kcal primary consumers $\rightar... |
| Distinguish between bioaccumulation and biomagnification of persistent organic pollutants (such as DDT, PCBs, and methylmercury). | • Bioaccumulation: The absorption and concentration of a fat-soluble toxin within the tissues of a single organism over its lifetime. | • Biomagnification: The exponential increase in tissue concentration of that persistent toxin at successively higher trophic levels in a food chain, causing eggshell thinning in apex predatory birds like bald eagles and ospreys. |
| What are the five major steps of the Nitrogen Cycle,including the chemical conversions and bacteria involved? | 1. | Nitrogen Fixation: $\text{N}_2 \rightarrow \text{NH}_3 / \text{NH}_4^+$ by Rhizobium bacteria in legume root nodules, cyanobacteria, or lightning/Haber-Bosch process. 2. Nitrification: $\text{NH}_4^+ \rightarrow \text{NO}_2^- \rightarrow \text{NO}_3^-$ by aerobic soil bacter... |
| Why is the Phosphorus Cycle unique among major biogeochemical cycles, and why is phosphorus commonly a limiting nutrient? | The phosphorus cycle has NO gaseous atmospheric phase (unlike carbon, nitrogen, and sulfur) | phosphorus is released slowly through the weathering of phosphate rock ($\text{PO}_4^{3-}$), has low solubility in water, and binds tightly to soil particles, making it the primary limiting macronutrient in freshwater lakes and terrestrial soils. |
| Contrast fast (short-term) and slow (long-term) reservoirs and fluxes in the Global Carbon Cycle. | • Fast biological cycle: Photosynthesis ($6\text{CO}_2 + 6\text{H}_2\text{O} \rightarrow \text{C}6\text{H}{12}\text{O}_6 + 6\text{O}_2$) and aerobic cellular respiration exchange carbon rapidly between the atmospher... | • Slow geological cycle: Marine sedimentation of calcium carbonate ($\text{CaCO}_3$) shells into limestone (the largest carbon reservoir on Earth) and burial of organic matter into fossil fuels (coal, oil, natural gas), which humans rapidly release via combustion. |
| How do human activities disrupt the Hydrologic (Water) Cycle in urban and agricultural watersheds? | Impervious urban surfaces (asphalt, concrete) and deforestation decrease infiltration and groundwater recharge while dramatically increasing surface runoff and peak flood discharge | agricultural irrigation depletes confined aquifers (such as the Ogallala Aquifer) and causes land subsidence and saltwater intrusion in coastal wells. |
| Compare the climate, soil profile, and biodiversity of Tropical Rainforests, Temperate Deciduous Forests, and Boreal Forests (Taiga). | • Tropical Rainforest: Warm/wet year-round | nutrient-poor, acidic, leached soils (oxisols) because rapid decomposition recycles nutrients directly into lush biomass; highest terrestrial biodiversity. • Temperate Deciduous Forest: Four seasons; deep, fertile humus-rich alfisols from annual leaf litter. • Boreal Forest (T... |
| What are the vertical zones of open ocean and freshwater lake ecosystems, and where is dissolved oxygen (DO) highest and lowest? | • Lakes: Littoral zone (shallow rooted plants), Limnetic zone (open sunlit water, phytoplankton), Profundal zone (deep aphotic water, low DO), and Benthic zone (bottom decomposers). | • Oceans: Intertidal, Neritic (continental shelf), Pelagic/Photic vs. Aphotic, and Abyssal zones. Dissolved oxygen is highest in cold, turbulent surface waters and lowest in warm, deep waters with high bacterial decomposition. |
| What are the three components of biodiversity, and why does high genetic diversity protect populations from the 'bottleneck effect'? | 1. Genetic diversity (variety of alleles within a population) | 2. Species diversity (species richness and species evenness); 3. Ecosystem/habitat diversity. When a population undergoes a severe bottleneck (sharp reduction in size), low genetic diversity increases inbreeding depression and vulnerability to novel diseases or climate shifts. |
| Distinguish between Species Richness and Species Evenness, and explain how Shannon's Diversity Index ($H$) evaluates community stability. | • Species Richness: The total number of different species present in an ecological community. | • Species Evenness: The relative abundance (proportion) of individuals distributed among those species. A community with both high richness and high evenness has a higher Shannon Diversity Index and greater resilience against environmental disturbances. |
| What are the four categories of Ecosystem Services, with a concrete exam example of each? | 1. | Provisioning Services: Tangibles harvested directly from nature (timber, freshwater, wild fish, medicinal plants). 2. Regulating Services: Natural processes that moderate climate and hazards (wetland flood absorption, carbon sequestration, bee pollination). 3. Cultural Service... |
👉 Practice Deck 1: APES: Ecosystems, Biodiversity, Biogeochemical Cycles & Population Ecology (32 Flashcards) →
🔍 Browse All Basic AP Environmental Science (APES), AP Microeconomics & AP Macroeconomics Sets →
Deck 2: APES: Earth Systems, Energy Resources, Atmospheric Pollution & Climate Change (32 Cards — Basic)
What this deck covers: High-yield AP Environmental Science Units 4–9 review covering plate tectonics, soil science, atmospheric circulation and ENSO, fossil fuels, nuclear and renewable energy, criteria air pollutants, smog, ozone depletion, solid waste, and climate change.
| High-Yield Prompt / Question | Core Concept & Mechanism | Exam Application & Details |
|---|---|---|
| Compare Divergent, Convergent, and Transform plate boundaries, including their geological features and hazards. | • Divergent Boundaries (plates move apart, driven by mantle convection): Mid-ocean ridges (Mid-Atlantic Ridge), seafloor spreading, rift valleys (East African Rift). • Convergent Boundaries (plates collide): Oceanic-c... | continental-continental collision creates folded mountains (Himalayas). • Transform Boundaries (plates slide past each other): Strike-slip faults (San Andreas Fault) and shallow earthquakes. |
| List the Soil Horizons from top to bottom and compare the properties of Sand, Silt, and Clay on the Soil Texture Triangle. | • Horizons: O (organic leaf litter/humus) $\rightarrow$ A (topsoil: dark humus + minerals, maximum biological activity) $\rightarrow$ E (zone of eluviation/leaching) $\rightarrow$ B (subsoil: zone of i... | Silt (medium); Clay (smallest particles: high microporosity and cation exchange capacity/nutrient retention, very low permeability/waterlogging). Loam (~40% sand, 40% silt, 20% clay) is ideal for agriculture. |
| What are the major sustainable Soil Conservation practices used to prevent erosion, salinization, and desertification? | • Contour Plowing & Terracing: Plowing across hill slopes or cutting flat steps into steep slopes to slow water runoff. | • No-Till Agriculture: Planting seeds directly into undisturbed crop residue to preserve soil structure, moisture, and carbon. • Windbreaks / Shelterbelts: Rows of trees blocking wind erosion. • Crop Rotation & Cover Crops (legumes): Replenishing soil nitrates. • Drip (Micro-)... |
| List the layers of Earth's atmosphere from bottom to top, and explain how Hadley Cells and the Coriolis Effect generate global wind belts. | • Layers: Troposphere (0–12 km: weather, 75% of atmospheric mass, greenhouse gases | temp decreases with altitude) $\rightarrow$ Stratosphere (12–50 km: stratospheric ozone layer $\text{O}_3$ absorbs UV-B/UV-C; temp increases with altitude) $\rightarrow$ Mesosphere (coldest; meteors burn up) $\rightarrow$ Thermosphere (auroras, UV/X-ray absorption)... |
| Contrast normal Pacific Ocean conditions with El Niño (ENSO Warm Phase) and La Niña (ENSO Cool Phase). | • Normal Conditions: Strong east-to-west Trade Winds push warm surface water toward Australia/Indonesia (bringing monsoons) and drive cold, nutrient-rich upwelling along the coast of Peru/Ecuador (supporting rich ... | warm water sloshes eastward toward South America, suppressing cold upwelling off Peru (collapsing fisheries, causing heavy rain/flooding in Peru/California and drought/wildfires in Australia/Indonesia). • La Niña: Unusually strong Trade Winds intensify cold upwelling o... |
| How does the Rain Shadow Effect create arid deserts on the leeward side of coastal mountain ranges? | Prevailing winds push warm, moist ocean air up the windward slope of a mountain range (such as the Sierra Nevada or Cascades) | as the air rises, it expands and cools adiabatically, condensing moisture into heavy orographic precipitation and lush forests on the windward side. The dry air then descends the leeward slope, compressing and warming to create an arid rain shadow desert (e.g., Death Valle... |
| Compare the environmental impacts of Surface Mining (mountaintop removal, strip mining, open-pit) and Subsurface Mining. | • Surface Mining: Removes overlying rock/soil (overburden, dumped as spoils/tailings), destroying surface habitats and burying valley streams | exposes sulfide minerals (pyrite, $\text{FeS}_2$) to air and rainwater to produce Acid Mine Drainage (sulfuric acid $\text{H}_2\text{SO}_4$ that leaches toxic heavy metals like lead, arsenic, and cadmium into streams). The U.S. SMCRA (1977) requires mine land reclamati... |
| What are the negative environmental consequences of Industrialized Agriculture (CAFOs, Monocropping) and Commercial Fishing (Bottom Trawling, Longlining)? | • CAFOs (Concentrated Animal Feeding Operations): Massive manure lagoons (nitrates, pathogens, hydrogen sulfide, methane), prophylactic antibiotic overuse breeding antibiotic-resistant bacteria, and high feed/water in... | Aquaculture (fish farming) can release concentrated fish waste, sea lice, and escaped GM/non-native fish. |
| Rank the four types of Coal by heat content and carbon purity, and explain how a Coal-Fired Steam Power Plant generates electricity. | • Coal Rank (from lowest to highest heat/carbon content and pressure/heat of burial): Peat (precursor) $\rightarrow$ Lignite $\rightarrow$ Sub-bituminous $\rightarrow$ Bituminous (high sulfur) $\rightarr... | • Electricity Generation (~35% thermal efficiency): Pulverized coal is burned in a boiler $\rightarrow$ thermal energy boils water into high-pressure steam $\rightarrow$ steam spins a turbine (kinetic energy) $\rightarrow$ turbine turns a generator magnet inside co... |
| How does Hydraulic Fracturing ('Fracking') extract natural gas and tight oil, and what are its environmental risks? | A wellbore is drilled vertically and then horizontally into deep shale rock formations (e.g., Marcellus or Permian Basin) | millions of gallons of high-pressure water mixed with sand (proppant to keep fissures open) and chemical lubricants are injected to fracture the shale and release trapped methane ($\text{CH}_4$). Risks: groundwater contamination from faulty well casings or wastewater spill... |
| How does a Nuclear Fission Reactor work, and what are the lessons of Three Mile Island, Chernobyl, and Fukushima? | • Mechanism: Neutrons bombard Uranium-235 ($^{235}\text{U}$) fuel pellets in fuel rods, splitting nuclei in a chain reaction that releases vast heat to boil water into steam and spin a turbine. *Control rods... | Chernobyl (USSR, 1986: steam explosion/graphite fire with no containment dome, widespread radioactive fallout); Fukushima Daiichi (Japan, 2011: magnitude 9.0 earthquake and tsunami knocked out backup diesel generators cooling the reactors). |
| Compare Active vs. Passive Solar Energy and Photovoltaic (PV) Cells vs. Concentrated Solar Thermal (CST) Power. | • Passive Solar: Architectural design (south-facing double-paned windows, thermal mass concrete/stone floors, summer roof overhangs) that heats/cools buildings without mechanical pumps. • Active Solar: Uses me... | can harm desert habitats and birds. |
👉 Practice Deck 2: APES: Earth Systems, Energy Resources, Atmospheric Pollution & Climate Change (32 Flashcards) →
🔍 Browse All Basic AP Environmental Science (APES), AP Microeconomics & AP Macroeconomics Sets →
Deck 3: AP Microeconomics: Supply, Demand, Elasticity, Consumer/Producer Surplus & Production Costs (32 Cards — Intermediate)
What this deck covers: High-yield AP Microeconomics Units 1–3 review covering scarcity, opportunity cost, PPCs, comparative advantage, supply and demand shifters, price/income/cross-price elasticities, consumer/producer surplus, taxes, price controls, and short-run/long-run production cost curves.
| High-Yield Prompt / Question | Core Concept & Mechanism | Exam Application & Details |
|---|---|---|
| Why is a Production Possibilities Curve (PPC) either bowed-out (concave) or a straight line, and what shifts the entire PPC outward? | • Bowed-out (Concave) PPC: Reflects the Law of Increasing Opportunity Cost—because economic resources (land, labor, capital) are specialized and not equally adaptable to producing both goods, shifting more res... | • Straight-Line PPC: Reflects constant opportunity cost (perfectly substitutable resources). • Outward Shift (Economic Growth): Caused by an increase in the quantity/quality of resources (labor, physical or human capital) or technological advancement. Producing mor... |
| How do you calculate Comparative Advantage and mutually beneficial Terms of Trade for Output Problems vs. Input Problems? | • Output Problem (units produced in a fixed time): Other Goes Over (OGO) $\rightarrow \text{Opportunity Cost of } A = \frac{\text{Units of } B}{\text{Units of } A}$. | • Input Problem (hours/workers needed to produce 1 unit): Other Goes Under (OGU) $\rightarrow \text{Opportunity Cost of } A = \frac{\text{Input for } A}{\text{Input for } B}$. • The producer with the lowest opportunity cost has the Comparative Advantage and should ... |
| Why does the Demand Curve slope downward, and what is the critical distinction between a 'Change in Quantity Demanded' and a 'Change in Demand'? | The Law of Demand ($P \uparrow \Rightarrow Q_d \downarrow$) is explained by three effects: (1) Substitution Effect (consumers switch to relatively cheaper substitutes), (2) Income Effect (higher prices red... | • Change in Quantity Demanded: A movement along a fixed demand curve caused only by a change in the good's own price. • Change in Demand: A shift of the entire demand curve (right = increase, left = decrease) caused by one of the 5 non-price TRIBE determinants. |
| What are the five non-price determinants that shift the Demand Curve ('TRIBE'), and how do Normal vs. Inferior Goods and Substitutes vs. Complements work? | • T: Tastes and preferences • R: Related goods' prices—for Substitutes (Coke & Pepsi), $P_{\text{Coke}} \uparrow \Rightarrow D_{\text{Pepsi}} \uparrow$ (shifts right) | for Complements (peanut butter & jelly), $P_{\text{PB}} \uparrow \Rightarrow D_{\text{Jelly}} \downarrow$ (shifts left). • I: Income—for a Normal Good, $\text{Income} \uparrow \Rightarrow D \uparrow$; for an Inferior Good (ramen noodles, bus rides), $\text{Inco... |
| What are the six non-price determinants that shift the Supply Curve ('ROTTEN')? | • R: Resource (input) prices—if wages or raw material costs rise, Supply shifts left ($S \downarrow$). • O: Other related goods' prices in production (joint or alternative outputs). • T: Technology—imp... | government subsidies shift Supply right/down. • E: Expectations of future output prices. • N: Number of sellers in the market. |
| What happens to Equilibrium Price ($P^$) and Equilibrium Quantity ($Q^$) when BOTH Supply and Demand shift simultaneously ('Double Shift Rule')? | Whenever Supply and Demand shift at the same time, one variable ($P^$ or $Q^$) is always indeterminate (ambiguous) unless the relative | Whenever Supply and Demand shift at the same time, one variable ($P^$ or $Q^$) is always indeterminate (ambiguous) unless the relative magnitudes of the shifts are known: • $D \uparrow$ and $S \uparrow \Rightarrow Q^* \uparrow$, $P^*$ indeterminate • $D \downarrow$ a... |
| How do you calculate Price Elasticity of Demand ($E_d$) using both the Percentage Change Formula and the Midpoint Formula, and how do you classify the values? | • Formula: $E_d = \frac{%\Delta Q_d}{%\Delta P}$. • Midpoint Formula: $E_d = \frac{(Q_2 - Q_1) / [(Q_1 + Q_2)/2]}{(P_2 - P_1) / [(P_1 + P_2)/2]}$. • Classification (using absolute value $|E_d|$): - $|... | many close substitutes, luxuries, long time horizon, large share of budget). - $|E_d| < 1$: Inelastic (quantity is unresponsive; necessities like insulin/gasoline, few substitutes). - $|E_d| = 1$: Unit Elastic. - $|E_d| = 0$: Perfectly Inelastic (vertical dem... |
| How does the Total Revenue Test ($TR = P \times Q$) connect Price Changes to Price Elasticity of Demand, and why does elasticity vary along a linear demand curve? | • Inelastic Demand ($|E_d| < 1$): Price ($P$) and Total Revenue ($TR$) move in the SAME direction ($P \uparrow \Rightarrow TR \uparrow$ | $P \downarrow \Rightarrow TR \downarrow$). • Elastic Demand ($|E_d| > 1$): Price ($P$) and Total Revenue ($TR$) move in OPPOSITE directions ($P \uparrow \Rightarrow TR \downarrow$; $P \downarrow \Rightarrow TR \uparrow$). • Unit Elastic ($|E_d| = 1$): Total Rev... |
| How do the signs (positive vs. negative) of Cross-Price Elasticity of Demand ($E_{xy}$) and Income Elasticity of Demand ($E_I$) classify goods? | • Cross-Price Elasticity: $E_{xy} = \frac{%\Delta Q_x}{%\Delta P_y}$. - If $E_{xy} > 0$ (positive): Goods $X$ and $Y$ are Substitutes. - If $E_{xy} < 0$ (negative): Goods $X$ and $Y$ are **Complement... | if $0 < E_I < 1$, a necessity). - If $E_I < 0$ (negative): Inferior Good. |
| What determines the Price Elasticity of Supply ($E_s = %\Delta Q_s / %\Delta P$), and how does time horizon affect it? | Price elasticity of supply is always positive (due to the Law of Supply) and depends on how easily producers can adjust inputs and expand capacity: • Immediate Market Period: Supply is perfectly inelastic ($E_... | supply is relatively inelastic. • Long Run: All inputs are variable and firms can enter/exit; supply is much more elastic. |
| Define Consumer Surplus (CS), Producer Surplus (PS), Total Surplus (Social Welfare), and Allocative Efficiency on a supply-and-demand graph. | • Consumer Surplus (CS): $\text{Willingness to Pay} - \text{Price Actually Paid}$ | graphically, the triangle below the Demand curve and above the market price ($\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$). • Producer Surplus (PS): $\text{Price Received} - \text{Minimum Willingness to Sell (Marginal Cost)}$; graphically, the tr... |
| Contrast a Binding Price Ceiling with a Binding Price Floor, including where each must be set relative to equilibrium $P^*$ and its market result. | • Binding Price Ceiling (e.g., rent control): A legal maximum price set BELOW equilibrium price ($P_c < P^*$). | Result: $Q_d > Q_s \Rightarrow$ persistent Shortage ($Q_d - Q_s$), reduced quantity traded ($Q_s$), Deadweight Loss, black markets, and non-price rationing. • Binding Price Floor (e.g., minimum wage, agricultural price supports): A legal minimum price set ABOVE... |
👉 Practice Deck 3: AP Microeconomics: Supply, Demand, Elasticity, Consumer/Producer Surplus & Production Costs (32 Flashcards) →
🔍 Browse All Intermediate AP Environmental Science (APES), AP Microeconomics & AP Macroeconomics Sets →
Deck 4: AP Microeconomics: Perfect Competition, Monopoly, Oligopoly, Factor Markets & Market Failure (32 Cards — Intermediate)
What this deck covers: High-yield AP Microeconomics Units 3–6 review covering Perfect Competition (short-run vs. long-run adjustment), Monopoly and Price Discrimination, Monopolistic Competition, Oligopoly Game Theory, Factor Markets (MRP = MRC), Monopsony, Externalities, and Public Goods.
| High-Yield Prompt / Question | Core Concept & Mechanism | Exam Application & Details |
|---|---|---|
| What are the defining characteristics of Perfect Competition, and why is an individual perfectly competitive firm's demand curve horizontal ('Mr. DARP')? | Characteristics: Many small buyers and sellers, identical (homogeneous) products (e.g., wheat, corn), perfect information, and zero barriers to entry or exit. | Because each firm produces a tiny fraction of market output, the firm is a Price Taker that can sell as many units as it wants at the market equilibrium price $P_m$—making its firm-level demand curve perfectly elastic (horizontal) where **Marginal Revenue = Demand = Averag... |
| How do you identify the Short-Run Supply Curve of a perfectly competitive firm? | A perfectly competitive firm produces where $P = MR = MC$ as long as $P \ge \min AVC$ (the shutdown point). | Therefore, the firm's Short-Run Supply Curve is the upward-sloping portion of its Marginal Cost ($MC$) curve at and above the minimum point of the $AVC$ curve. |
| Describe the step-by-step transition from Short-Run Economic Profit to Long-Run Equilibrium in a Perfectly Competitive Industry. | 1. | Suppose firms in the short run earn positive economic profit ($P > ATC$). 2. Because there are no barriers to entry, new firms enter the industry in the long run. 3. Entry shifts the Market Supply curve to the right ($S \uparrow$), driving the market equilibrium price ... |
| Distinguish between a Constant-Cost, Increasing-Cost, and Decreasing-Cost Industry in Long-Run Perfect Competition. | • Constant-Cost Industry: Entry of new firms does not affect input prices, so each firm's $ATC$ curve stays at the same level and the Long-Run Industry Supply ($LRS$) curve is horizontal (perfectly elastic). | • Increasing-Cost Industry: Entry of new firms bids up specialized input/resource prices, shifting every firm's $ATC$ curve upward so the $LRS$ curve slopes upward. • Decreasing-Cost Industry: Entry of new firms lowers input prices via external economies of scale, ... |
| Why does an unregulated Single-Price Monopoly's Marginal Revenue ($MR$) curve lie BELOW its downward-sloping Demand ($D$) curve, and how does the monopolist set $Q_m$ and $P_m$? | To sell one additional unit along a downward-sloping market demand curve, a single-price monopolist must lower the price not only on the new unit but also on all previous units—making $MR < P$ for every unit after... | • Quantity ($Q_m$): Found at the intersection where $MR = MC$. • Price ($P_m$): Go vertically UP from $Q_m$ to the Demand ($D$) curve (never stop at the $MR=MC$ intersection!). • Because $P_m > MC$ and $Q_m < Q_c$, a single-price monopoly is **allocatively inef... |
| On a Monopoly graph, how do you identify the Revenue-Maximizing Quantity, the Elastic vs. Inelastic range of Demand, the Socially Optimal Point, and the Fair-Return Point? | • Total Revenue Maximized: At the quantity where $MR = 0$ (the exact midpoint of Demand, where $|E_d| = 1$). A profit-maximizing monopolist ALWAYS operates in the ELASTIC range of demand ($|E_d| > 1$) ... | zero DWL). • Fair-Return (Break-Even / Normal Profit) Regulation: Price ceiling where $P = ATC$ (where $D$ intersects $ATC$; zero economic profit). |
| What is a Natural Monopoly, and why does regulating a Natural Monopoly at the Socially Optimal Price ($P = MC$) require a government subsidy? | A Natural Monopoly (e.g., municipal water, electric grid) occurs when a single firm experiences Economies of Scale ($LRATC$ downward-sloping) across the entire range of market demand, so one firm can supply th... | Because $ATC$ is still falling where Demand intersects $MC$, $MC$ lies BELOW $ATC$ ($P_{soc} = MC < ATC$). Forcing the firm to charge $P = MC$ causes an economic loss, requiring either a lump-sum government subsidy or Fair-Return pricing ($P = ATC$). |
| What are the conditions required for Price Discrimination, and what happens when a Monopolist practices Perfect (First-Degree) Price Discrimination? | • Conditions: (1) Monopoly/market power (downward-sloping demand), (2) Ability to segregate consumers by willingness to pay (elasticity), and (3) No resale / arbitrage between buyers. | • Perfect (First-Degree) Price Discrimination: The monopolist charges each consumer their exact maximum willingness to pay for every unit. Result: The Demand curve becomes the $MR$ curve ($D = MR$), the monopolist produces the **allocatively efficient output ($Q_c$, wh... |
| What are the characteristics of Monopolistic Competition, and why do firms exhibit 'Excess Capacity' in Long-Run Equilibrium? | • Characteristics: Many sellers, differentiated products (branding, quality, location—e.g., restaurants, clothing), some price-setting power (downward-sloping $D$ and $MR < D$), and **low barriers to entry/exi... | • Long-Run Equilibrium: Entry/exit drives economic profit to zero ($P = ATC$) at the quantity $Q_{mc}$ where $MR = MC$ (the downward-sloping Demand curve is tangent to the downward-sloping portion of the $ATC$ curve). • Excess Capacity: The gap between the firm... |
| What defines an Oligopoly, and how do Collusion (Cartels) and the Herfindahl-Hirschman Index (HHI) / Four-Firm Concentration Ratio work? | • Oligopoly: A market dominated by a few interdependent large firms (high barriers to entry, identical or differentiated products) where each firm's profit depends on rivals' strategic reactions. • **Four-Firm... | HHI: Sum of squared market shares of all firms ($\sum s_i^2$, up to $10,000$ for monopoly). • Collusion / Cartel (e.g., OPEC): Firms jointly restrict output and fix prices to act like a monopoly, but each member has a strong unilateral incentive to cheat by secretl... |
| In a 2x2 Oligopoly Payoff Matrix (Game Theory), how do you find a Dominant Strategy, a Nash Equilibrium, and a Prisoner's Dilemma? | • Dominant Strategy: A strategy that yields a strictly higher payoff for a player regardless of which strategy the other player chooses. | • Nash Equilibrium: An outcome cell where neither player can improve their payoff by unilaterally changing their strategy given the other player's choice. • Prisoner's Dilemma: A game in which both players follow their individual dominant strategies (e.g., both con... |
| What is 'Derived Demand' in a Factor (Resource/Labor) Market, and how do you calculate Marginal Revenue Product ($MRP_L$) and Marginal Resource Cost ($MRC_L$)? | • Derived Demand: A firm's demand for a resource (such as labor) is derived from consumer demand for the final product that labor produces. | • Marginal Revenue Product ($MRP_L$)—the firm's Labor Demand curve: $$MRP_L = \frac{\Delta TR}{\Delta L} = MP_L \times MR$$ (In a perfectly competitive output market where $MR = P$, $MRP_L = MP_L \times P$). • **Marginal Resource Cost ($MRC_L$ / Marginal Factor Cos... |
👉 Practice Deck 4: AP Microeconomics: Perfect Competition, Monopoly, Oligopoly, Factor Markets & Market Failure (32 Flashcards) →
🔍 Browse All Intermediate AP Environmental Science (APES), AP Microeconomics & AP Macroeconomics Sets →
Deck 5: AP Macroeconomics: GDP, Inflation, Unemployment, AD-AS Model, Multipliers & Fiscal Policy (32 Cards — Advanced)
What this deck covers: High-yield AP Macroeconomics Units 1–3 & 5 review covering circular flow, Expenditure/Income GDP, nominal vs. real GDP, CPI, GDP deflator, unemployment types, AD-SRAS-LRAS model, spending and tax multipliers, fiscal policy, Phillips Curve, and crowding out.
| High-Yield Prompt / Question | Core Concept & Mechanism | Exam Application & Details |
|---|---|---|
| What is Gross Domestic Product (GDP), how is it calculated under the Expenditure Approach vs. the Income Approach, and what transactions are excluded from GDP? | GDP is the total market value of all final goods and services produced within a country's geographic borders during a given period (usually a year). | • Expenditure Approach: $\text{GDP} = C + I + G + X_n$, where $C$ = Consumer spending, $I$ = Gross Private Domestic Investment (business capital equipment, new residential construction, and changes in business inventories), $G$ = Government purchases of goods/servi... |
| Distinguish between Nominal GDP and Real GDP, and state the formula for the GDP Deflator. | • Nominal GDP: Value of final output measured in current-year prices ($\sum P_{\text{current}} \times Q_{\text{current}}$) | can increase simply because of inflation. • Real GDP: Value of final output adjusted for inflation using constant base-year prices ($\sum P_{\text{base}} \times Q_{\text{current}}$); measures true changes in physical output. • GDP Deflator: $$\text{GDP Deflator} = ... |
| How is the Consumer Price Index (CPI) calculated, how does it differ from the GDP Deflator, and what are the three biases that cause CPI to overstate inflation? | • CPI Formula (fixed market basket $Q_{\text{base}}$): $$\text{CPI} = \frac{\text{Cost of Market Basket in Current Year}}{\text{Cost of Market Basket in Base Year}} \times 100$$ • Inflation Rate: $\frac{\text{... | GDP Deflator includes all domestically produced final goods ($C, I, G, X$). • CPI Biases: (1) Substitution Bias (ignores consumers switching to cheaper substitutes), (2) Quality Improvement Bias, and (3) New Product Bias. |
| Who is helped and who is hurt by Unexpected Inflation, and howdoes the Fisher Equation connect Nominal Interest Rates ($i$), Real Interest Rates ($r$), and Inflation ($\pi$)? | • Fisher Equation: $$r = i - \pi \quad (\text{or } i = r + \pi^e)$$ where $r$ = Real interest rate, $i$ = Nominal interest rate, and $\pi$ = Inflation rate. | • When Actual Inflation $>$ Expected Inflation ($\pi > \pi^e$): - HELPS Borrowers (Debtors) and firms paying fixed nominal wages/contracts, because they repay loans with dollars that have lower real purchasing power (real interest rate falls). - **HURTS Lenders (Credit... |
| Write the formulas for the Labor Force Participation Rate (LFPR) and the Unemployment Rate (UR), and explain how 'Discouraged Workers' and 'Part-Time Workers' distort the official unemployment rate. | • Labor Force ($LF$): $\text{Employed} + \text{Unemployed}$ (adults $16+$ who are non-institutionalized, civilian, and actively looked for work in the past 4 weeks). • LFPR: $\frac{\text{Labor Force}}{\text{Ad... | involuntary part-time workers are counted as fully employed, also understating underemployment. |
| Distinguish among Frictional, Structural, and Cyclical Unemployment, and define the Natural Rate of Unemployment (NRU). | • Frictional Unemployment: Short-term unemployment while workers search for a job matching their skills (recent graduates, workers relocating or voluntarily switching jobs). | • Structural Unemployment: Persistent mismatch between workers' skills/locations and employers' needs (caused by automation/technology, offshoring, or binding minimum wages/efficiency wages). • Cyclical Unemployment: Unemployment caused by a downturn in the business cy... |
| Why does the Aggregate Demand ($AD$) curve slope downward (3 effects), and what shifts the $AD$ curve? | Never use microeconomic substitution to explain $AD$! The $AD$ curve slopes downward (Price Level $PL \uparrow \Rightarrow \text{Real GDP } Y \downarrow$) due to: 1. | Real Wealth (Real Balances) Effect: Higher $PL$ erodes the real purchasing power of household financial wealth, reducing Consumption ($C \downarrow$). 2. Interest Rate Effect: Higher $PL$ increases money demand to buy goods, driving up nominal interest rates ($i \uparr... |
| Why does the Short-Run Aggregate Supply ($SRAS$) curve slope upward while the Long-Run Aggregate Supply ($LRAS$) curve is vertical at Full-Employment Output ($Y_f$)? | • Upward-Sloping $SRAS$: In the short run, nominal wages and input prices are 'sticky' (fixed by labor contracts, menu costs, and misperceptions). | When the output Price Level ($PL$) rises while nominal wages stay fixed, real wages fall and profit margins per unit expand, inducing firms to increase Real GDP output. • Vertical $LRAS$ (at $Y_f$): In the long run, all nominal wages and input prices are fully flexible... |
| How do you calculate the Marginal Propensity to Consume ($MPC$), Marginal Propensity to Save ($MPS$), the Simple Spending Multiplier, the Tax Multiplier, and the Balanced-Budget Multiplier? | • $MPC = \frac{\Delta C}{\Delta DI}$, $MPS = \frac{\Delta S}{\Delta DI}$, and $MPC + MPS = 1$. | • Simple Spending (Expenditure) Multiplier (applies to $\Delta G$, $\Delta I$, $\Delta X_n$): $$k_G = \frac{1}{1 - MPC} = \frac{1}{MPS} \implies \Delta \text{GDP} = k_G \times \Delta G$$ • Tax (and Transfer) Multiplier (smaller in magnitude by 1 because households save... |
| On an $AD\text{–}SRAS\text{–}LRAS$ graph, compare a Recessionary Gap with an Inflationary Gap, and explain how the economy self-corrects in the Long Run if the government takes NO policy action. | • Recessionary (Negative Output) Gap ($Y_1 < Y_f$, Unemployment $>$ NRU): - Long-Run Self-Correction: High unemployment eventually forces workers to accept lower nominal wages as contracts expire $\rightarro... | • Inflationary (Positive Output) Gap ($Y_1 > Y_f$, Unemployment $<$ NRU): - Long-Run Self-Correction: Labor shortages and high prices bid nominal wages UP $\rightarrow$ higher input costs shift $SRAS$ to the LEFT ($SRAS \downarrow$) $\rightarrow$ restores Full Em... |
| What is 'Stagflation' (Cost-Push Inflation) in the $AD\text{–}AS$ model, and why does it create a policy dilemma for stabilization policymakers? | Stagflation occurs when a negative supply shock (such as the 1973 OPEC oil embargo or a jump in nominal wages/commodity prices) shifts the $SRAS$ curve to the LEFT, causing **BOTH a higher Price Level ($PL \up... | Policy Dilemma: • Expansionary policy ($AD \uparrow$) cures the recession ($Y$ returns to $Y_f$) but makes inflation even worse. • Contractionary policy ($AD \downarrow$) fights inflation ($PL$ falls) but makes unemployment even worse. |
| Contrast Discretionary Expansionary Fiscal Policy and Contractionary Fiscal Policy with Automatic Stabilizers. | Fiscal Policy is conducted by Congress and the President via the federal budget: • Expansionary Fiscal Policy (used during a Recessionary Gap): Increase Government Spending ($G \uparrow$) and/or **Cut ... | • Contractionary Fiscal Policy (used during an Inflationary Gap): Decrease Government Spending ($G \downarrow$) and/or Raise Taxes ($T \uparrow$) $\rightarrow$ shifts $AD$ left ($Y \downarrow, PL \downarrow, \text{Unemployment} \uparrow$), moving the budget tow... |
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Deck 6: AP Macroeconomics: Money Market, Loanable Funds, Central Bank Monetary Policy & Foreign Exchange (32 Cards — Advanced)
What this deck covers: High-yield AP Macroeconomics Units 4 & 6 review covering functions of money, M1/M2, fractional reserve banking, the money multiplier, Money Market vs. Loanable Funds graphs, Federal Reserve monetary policy (ample vs. limited reserves), Balance of Payments, and Foreign Exchange.
| High-Yield Prompt / Question | Core Concept & Mechanism | Exam Application & Details |
|---|---|---|
| What are the three Functions of Money, and what assets are included in the M1 and M2 Monetary Aggregates (and the Monetary Base $MB$)? | • Three Functions of Money: 1. Medium of Exchange (eliminates the 'double coincidence of wants' of barter) | 2. Unit of Account (yardstick for measuring prices and debts); 3. Store of Value (preserves purchasing power over time, though eroded by inflation). • Monetary Base ($MB$, 'high-powered money'): Currency in circulation + Bank reserves held at the Central Bank. • **... |
| Why do Bond Prices and Nominal Interest Rates ALWAYS move in OPPOSITE directions? | Existing bonds pay a fixed annual dollar coupon (e.g., $$50$/year on a $$1,000$ face-value bond $= 5%$ yield). | If market nominal interest rates rise to $10%$, no investor will buy the old $$50$-coupon bond unless its market price falls so that $\frac{\text{Fixed Coupon}}{\text{Bond Price}}$ matches the higher new market yield. Conversely, when interest rates fall, existin... |
| On a commercial bank T-Account (Balance Sheet), distinguish between Assets and Liabilities, and between Required Reserves ($RR$) and Excess Reserves ($ER$). | • Liabilities: Demand Deposits (checkable deposits owed to customers), Savings/Time Deposits, Borrowings from the Fed/other banks, and Bank Capital (Net Worth / Owners' Equity). | • Assets: Total Reserves (Vault cash + Reserve deposits at the Fed), Loans to customers, Government Bonds (Treasury securities), and Physical Property. • Reserves Formula: $\text{Total Reserves (TR)} = \text{Required Reserves (RR)} + \text{Excess Reserves (... |
| What is the Money Multiplier ($1/rr$), and why does a $$1,000$ Cash Deposit by a customer increase the Money Supply ($M1$) by LESS than a $$1,000$ Federal Reserve Open-Market Bond Purchase? | • Simple Money Multiplier: $mm = \frac{1}{rr}$ (where $rr$ is the Required Reserve Ratio). | • Case 1: Customer Deposits $$1,000$ Cash into Checking (with $rr = 0.10$, $mm = 10$): - Immediate change in $M1 = $0$ (composition shifts from currency to demand deposits). - Bank must hold $10%$ ($$100$) as Required Reserves and gets $ER = $900$. - **Maximum... |
| What three real-world leakages make the actual Money Multiplier smaller than the theoretical $\frac{1}{rr}$? | 1. | Banks hold Excess Reserves: Banks may choose not to lend out 100% of their excess reserves (especially when the Fed pays interest on reserves or during economic uncertainty). 2. Households hold Cash (Currency Drain): Borrowers keep part of their loans as physical curre... |
| Draw and label the Money Market Graph, and explain what shifts Money Demand ($MD$) versus Money Supply ($MS$). | • Axes: Vertical axis = Nominal Interest Rate ($i$) (the opportunity cost of holding liquid money instead of interest-bearing bonds) | Horizontal axis = Quantity of Money ($M$). • Money Demand ($MD$): Downward-sloping because at high nominal interest rates ($i$), people hold less cash and more bonds (asset demand). $MD$ Shifters (Transaction Demand, proportional to Nominal GDP = $PL \times Y$): 1.... |
| Compare the Central Bank's Monetary Policy Tools in an Economy with LIMITED RESERVES vs. an Economy with AMPLE RESERVES (the current AP Macro framework). | • Limited Reserves Regime (traditional Money Market / Reserve Market steep slope): The Central Bank changes the money supply and the overnight policy rate (Federal Funds Rate) using three tools: 1. **Open-Mark... | 2. Required Reserve Ratio ($rr$); 3. Discount Rate (interest rate the Fed charges banks for direct loans). • Ample Reserves Regime (flat lower portion of the Reserve Demand curve, like the U.S. Fed today): Small OMOs do not change the policy rate! Instead, the Ce... |
| Draw the Reserve Market Graph (Policy Rate vs. Quantity of Reserves) and explain how Expansionary vs. Contractionary Monetary Policy works under Ample Reserves. | • Reserve Market Axes: Vertical axis = Policy Rate (Federal Funds Rate) | Horizontal axis = Quantity of Bank Reserves. • Demand for Reserves Curve: Has a downward-sloping section (when reserves are limited, capped at the Discount Rate) and a flat horizontal floor (when reserves are ample, anchored at the **Interest on Reserves [I... |
| Trace the complete Monetary Policy Transmission Mechanism for Expansionary and Contractionary Monetary Policy in a Limited Reserves Regime. | • Expansionary (Easy Money) Policy (Recessionary Gap): Central Bank buys bonds (or lowers $rr$ / Discount Rate) $\rightarrow$ Bank Excess Reserves $\uparrow$ $\rightarrow$ Money Supply ($MS$) shifts RIGHT ... | • Contractionary (Tight Money) Policy (Inflationary Gap): Central Bank sells bonds (or raises $rr$ / Discount Rate) $\rightarrow$ Bank Reserves $\downarrow$ $\rightarrow$ $MS$ shifts LEFT $\rightarrow$ Interest Rate ($i$) RISES $\rightarrow$ $I$ and $C$ **DECRE... |
| Compare the Money Market Graph and the Loanable Funds Market Graph, including their axes, borrowers/lenders, and shifters. | • Money Market (Short-Run liquidity): Vertical axis = Nominal Interest Rate ($i$) | Horizontal axis = Quantity of Money ($M$); $MS$ is vertical (set by Central Bank). • Loanable Funds Market (Long-Run saving & investment): Vertical axis = Real Interest Rate ($r$); Horizontal axis = Quantity of Loanable Funds ($Q_{LF}$). - **Demand for Loanable... |
| How is the 'Crowding-Out Effect' of Deficit-Financed Expansionary Fiscal Policy shown on the Loanable Funds Graph? | When the government increases spending ($G \uparrow$) or cuts taxes ($T \downarrow$) without an offsetting policy, the resulting budget deficit can be modeled on the Loanable Funds graph in either of two accepted ... | OR 2. Supply of Loanable Funds shifts LEFT ($S_{LF} \downarrow$) as national saving ($S_{\text{private}} + S_{\text{public}}$) decreases. In BOTH representations, the Real Interest Rate ($r$) RISES, which reduces private business Investment ($I \downarrow$) and... |
| How do Monetary Policy and Fiscal Policy interact when used together (Policy Mixes) to affect Real GDP ($Y$), the Interest Rate ($r$), and Investment ($I$)? | • Expansionary Fiscal ($G \uparrow$) + Expansionary Monetary ($MS \uparrow$) (both fight recession): Real GDP $Y$ definitely increases, while the effect on the Interest Rate is indeterminate ($G \uparrow$ ... | • Contractionary Fiscal ($G \downarrow$) + Expansionary Monetary ($MS \uparrow$): Interest Rate $i$ and $r$ definitely FALL, which strongly boosts Private Investment ($I \uparrow$) and long-run economic growth! • **Expansionary Fiscal ($G \uparrow$) + Contractionar... |
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Complete 6-Deck Quick-Access Directory
| Deck # | Deck Title | Level | Cards | Direct Practice Link |
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| Deck 5 | AP Macroeconomics: GDP, Inflation, Unemployment, AD-AS Model, Multipliers & Fiscal Policy | advanced |
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