AP Environmental Science Math Review

I-131 has a half life of about 8 days. if an original sample weights 240kg, how many kg will remain after 32 days? (Half-life)

• 15

• 30

• 45

• 60

• 120

If a city of population 10,000 experiences 100 births, 40 deaths, 10 immigrants and 30 emigrants in the course of a year, what is the net annual percentage growth rate? (population)

• 0.4%

• 0.8%

• 1.0%

• 4.0%

• 8.0%

Tags

NGSS.MS-ESS3-4

If the population of a country grows at a rate of approximately 5 percent per year, the number of years required for the population to double is closest to (population)

• 5 years

• 10 years

• 15 years

• 25 years

• 35 years

The amount of energy that usually transfers from one trophic level to the next...

• 10%

• 20%

• 80%

• 50%

Tags

NGSS.MS-LS2-3

The study of how humans interact with the environment

• environmental science

• biology

• ecology

• physics

Tags

NGSS.MS-ESS3-2

NGSS.MS-ESS3-4

NGSS.MS-LS2-5

If a forest area of 500 hectares is reduced by 10% annually due to deforestation, how much area will remain after 3 years?

• 364.5 hectares

• 405 hectares

• 450 hectares

• 500 hectares

A car emits 4.6 metric tons of CO2 annually. If a city has 1,000 such cars, what is the total CO2 emission from these cars in a year?

• 4,600 metric tons

• 46,000 metric tons

• 460 metric tons

• 46 metric tons

If the pH of a solution changes from 5 to 3, how does the hydrogen ion concentration change?

• Increases by 100 times

• Decreases by 100 times

• Increases by 10 times

• Decreases by 10 times

A wind turbine generates 2 MW of power. If it operates for 10 hours a day, how much energy does it produce in a day?

• 20 MWh

• 200 MWh

• 2,000 MWh

• 20,000 MWh

If a population of bacteria doubles every 4 hours, how many times will it double in 24 hours?

• 4 times

• 5 times

• 6 times

• 8 times