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← AP Environmental Science
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Prepare for the timed AP Environmental Science test.

Your answers are held until submission. The final review identifies the units that need another pass.

AP Environmental Science coverage and review map

Connect every question to the exact skill it rehearses. Work through the units in order, then return to any topic that still needs a hint or a second attempt.

01

The Living World: Ecosystems

Energy flow, biomes, cycles, productivity

Goal: recognise a the living world: ecosystems problem from its wording, carry out the governing method, and check that the result is reasonable.

02

The Living World: Biodiversity

Ecosystem services, island biogeography, succession

Goal: recognise a the living world: biodiversity problem from its wording, carry out the governing method, and check that the result is reasonable.

03

Populations

Demography, growth, survivorship

Goal: recognise a populations problem from its wording, carry out the governing method, and check that the result is reasonable.

04

Earth Systems and Resources

Geology, soils, atmosphere, climate

Goal: recognise a earth systems and resources problem from its wording, carry out the governing method, and check that the result is reasonable.

05

Land and Water Use

Agriculture, forestry, mining, urbanization

Goal: recognise a land and water use problem from its wording, carry out the governing method, and check that the result is reasonable.

06

Energy Resources and Consumption

Fuels, renewables, conservation

Goal: recognise a energy resources and consumption problem from its wording, carry out the governing method, and check that the result is reasonable.

07

Atmospheric Pollution

Sources, chemistry, health, control

Goal: recognise a atmospheric pollution problem from its wording, carry out the governing method, and check that the result is reasonable.

08

Aquatic and Terrestrial Pollution

Waste, toxins, water quality

Goal: recognise a aquatic and terrestrial pollution problem from its wording, carry out the governing method, and check that the result is reasonable.

09

Global Change

Climate, ozone, biodiversity loss

Goal: recognise a global change problem from its wording, carry out the governing method, and check that the result is reasonable.

AP Environmental Science questions with worked answers

These 8 questions are printed in full on this page and are drawn across 8 of the 9 course units. Nothing here is generated on the fly. Cover the options, solve each one on paper, and only then open the worked answer to compare your method with the one shown.

Question 1: Producers in a field capture 15,000 kcal. Using the 10% rule, how much energy is available to primary consumers?

AP Environmental Science · The Living World: Ecosystems

  1. 1,500 kcal
  2. 150 kcal
  3. 15,000 kcal
  4. 3,000 kcal
Show the worked answer
  1. Only about 10% of the energy at one trophic level moves to the next.
  2. The rest is lost mostly as heat during respiration.
  3. 15,000 x 0.10 = 1,500.
  4. So primary consumers receive about 1,500 kcal.

Answer: 1,500 kcal

Question 2: A survey of 100 trees finds 40 oaks, 30 pines, and 30 maples. What is the relative abundance of pines?

AP Environmental Science · The Living World: Biodiversity

  1. 30%
  2. 3%
  3. 33%
  4. 10%
Show the worked answer
  1. Relative abundance is one species divided by the total count.
  2. There are 30 pines out of 100 trees.
  3. 30 / 100 = 0.30.
  4. As a percentage that is 30%.

Answer: 30%

Question 3: A population grows 2% per year. Using the rule of 70, about how long does it take to double?

AP Environmental Science · Populations

  1. 35 years
  2. 70 years
  3. 20 years
  4. 14 years
Show the worked answer
  1. The rule of 70 estimates doubling time as 70 divided by the percent growth rate.
  2. The growth rate here is 2.
  3. 70 / 2 = 35.
  4. So the population roughly doubles in 35 years.

Answer: 35 years

Question 4: A 5 hectare field receives 1,200 mm of rain in a year. What volume of water is that? One hectare is 10,000 square meters.

AP Environmental Science · Earth Systems and Resources

  1. 60,000 cubic meters
  2. 6,000 cubic meters
  3. 600,000 cubic meters
  4. 60 cubic meters
Show the worked answer
  1. Convert the rainfall depth: 1,200 mm = 1.2 meters.
  2. Convert the area: 5 hectares x 10,000 = 50,000 square meters.
  3. Volume is depth times area.
  4. 1.2 x 50,000 = 60,000 cubic meters.

Answer: 60,000 cubic meters

Question 5: A 100 W bulb runs 10 hours a day for 30 days. At $0.15 per kWh, what is the cost?

AP Environmental Science · Energy Resources and Consumption

  1. $4.50
  2. $0.45
  3. $45.00
  4. $3.00
Show the worked answer
  1. Energy in watt-hours is 100 x 10 x 30 = 30,000 Wh.
  2. Divide by 1,000 to get kilowatt-hours: 30 kWh.
  3. Multiply by the price: 30 x 0.15.
  4. That equals $4.50.

Answer: $4.50

Question 6: A control program lowers carbon monoxide from 8 ppm to 2 ppm. What percent reduction is that?

AP Environmental Science · Atmospheric Pollution

  1. 75%
  2. 25%
  3. 60%
  4. 80%
Show the worked answer
  1. The drop is 8 - 2 = 6 ppm.
  2. Percent reduction compares the drop with the starting level.
  3. 6 / 8 = 0.75.
  4. That is a 75% reduction.

Answer: 75%

Question 7: A pesticide has a half-life of 15 years in soil. What percent remains after 45 years?

AP Environmental Science · Aquatic and Terrestrial Pollution

  1. 12.5%
  2. 25%
  3. 33%
  4. 6.25%
Show the worked answer
  1. 45 years is 45 / 15 = 3 half-lives.
  2. After one half-life, 50% remains.
  3. After two, 25% remains.
  4. After three, 12.5% remains.

Answer: 12.5%

Question 8: Atmospheric carbon dioxide rose from about 280 ppm before industry to about 420 ppm. What is the percent increase?

AP Environmental Science · Global Change

  1. 50%
  2. 33%
  3. 140%
  4. 67%
Show the worked answer
  1. The increase is 420 - 280 = 140 ppm.
  2. Percent increase compares the rise with the original amount.
  3. 140 / 280 = 0.50.
  4. That is a 50% increase.

Answer: 50%

Which unit each printed question belongs to

Use this map after marking your work. If two misses share a unit, review that unit before starting a generated set.

The 8 printed AP Environmental Science questions, the unit each one tests, and its answer.
QuestionUnitWhat it asksAnswer
1The Living World: EcosystemsProducers in a field capture 15,000 kcal. Using the 10% rule, how much energy is available to primary consumers?1,500 kcal
2The Living World: BiodiversityA survey of 100 trees finds 40 oaks, 30 pines, and 30 maples. What is the relative abundance of pines?30%
3PopulationsA population grows 2% per year. Using the rule of 70, about how long does it take to double?35 years
4Earth Systems and ResourcesA 5 hectare field receives 1,200 mm of rain in a year. What volume of water is that? One hectare is 10,000 square meters.60,000 cubic meters
5Energy Resources and ConsumptionA 100 W bulb runs 10 hours a day for 30 days. At $0.15 per kWh, what is the cost?$4.50
6Atmospheric PollutionA control program lowers carbon monoxide from 8 ppm to 2 ppm. What percent reduction is that?75%
7Aquatic and Terrestrial PollutionA pesticide has a half-life of 15 years in soil. What percent remains after 45 years?12.5%
8Global ChangeAtmospheric carbon dioxide rose from about 280 ppm before industry to about 420 ppm. What is the percent increase?50%

How the generated AP Environmental Science sets are created

The 8 questions above are fixed and checked. The generator at the top of the page is different: it writes fresh questions with AI from the course and unit information shown here, then the application checks each one for a complete prompt, four choices, one keyed answer, and an explanation. Generated questions are original practice—not official or released exam questions—and AI can still make mathematical mistakes. Verify a disputed answer with the stated method, your course materials, or the MathGPT solver, and follow the site's academic-integrity guidance.

Questions about this AP Environmental Science course test

What does this page cover?

It covers all 9 AP Environmental Science units listed above.

When can I see correct answers and explanations?

Submit the full test first. The result screen then shows every response, the correct answer, and the explanation so you can review each miss.

How long is each section of the AP Environmental Science exam?

Multiple choice: 1 hour 30 minutes, 80 questions. Free response: 1 hour 10 minutes, 3 questions.

Which AP Environmental Science sections allow a calculator?

Rules change from section to section. Multiple choice: four-function calculator. Free response: four-function calculator. Provided: formula sheet with equations and constants. Practise each section under its own rule.

Which AP Environmental Science units does this test cover?

All nine: The Living World: Ecosystems, The Living World: Biodiversity, Populations, Earth Systems and Resources, Land and Water Use, Energy Resources and Consumption, Atmospheric Pollution, Aquatic and Terrestrial Pollution, Global Change. Study first: Global Change (15–20%) carries the largest published weighting.

What should I check first when I review a missed AP Environmental Science question?

Vague solutions. 'Raise awareness' and 'be more sustainable' score nothing; a named technology, policy, or practice with a stated mechanism scores.

What should I do with a missed question?

Classify the miss as a definition, setup, calculation, interpretation, or timing error. Re-solve it from a blank page, then use the MathGPT tutor for a hint or method check.