AP Environmental Science Math Review

Based on the table, calculate the efficiency of energy transfer in percent for (Energy flow)

-producers to primary consumers

-primary consumers to secondary consumers

-secondary consumers to tertiary consumers

• 6%, 1.3%, 0.8%

• 16.7%, 1.3%, 10%

• 16.7%, 8.0% , 10%

• 16.7%, 8.0% , 0.8%

• 12.5%, 10%, 16.7%

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-4

A sample of radioactive waste has a half-life of 10 years and an activity level of 2 curies. After how many years will the activity level of this sample be 0.125 curie? (Half-life)

• 10 years

• 20 years

• 30 years

• 40 years

• 80 years

Tags

NGSS.HS-PS1-8

The current global human population is about 6.1 billion and is growing at an annual rate of 1.35 percent. If world population were to grow at that rate for the next year, approximately how many people would be added? (population)

• 8 x 10⁵

• 8 x 10⁶

• 8 x 10⁷

• 8 x 10⁸

• 8 x 10⁹

The combustion of one gallon of automobile fuel produces about 5 pounds of carbon (in CO₂). Two autos are making a trip of 600 miles. The first auto gets 20 miles per gallon and the second gets 30 miles per gallon. Approximately how much less carbon (in CO₂) will be produced by the second auto on this trip? (Resources)

• 300 lbs

• 150 lbs

• 100 lbs

• 75 lbs

• 50 lbs

Tags

NGSS.HS-ETS1-3

If the annual consumption of petroleum in the United States is about 23 barrels per capita, the total annual consumption of petroleum in the United States is closest to (Resources) Hint: What is the approximate population of the US?

• 12 million barrels

• 240 barrels

• 2 billion barrals

• 6 billion barrels

• 10 billion barrels

Uranium-235 has a half-life of 710 million years. If it is determined that a certain amount of stored U-235 will be considered safe only when its radioactivity has dropped to 0.10 percent of the original level, approximately how much time must the U-235 be stored securely to be safe? (Half-life) Hint: Make your life easier...move some decimals!

• 7.1 x 10⁶ years

• 7.1 x 10⁷ years

• 7.1 x 10⁸ years

• 7.1 x 10⁹ years

• 7.1 x 10¹⁰ years

Tags

NGSS.HS-PS1-8

Plutonium-239 has a half life of 24,000 years. How much of a 1 gram sample will remain after 96,000 years? (Half-life)

• 1 gram

• 0.5 grams

• 0.25 grams

• 0.125 grams

• 0.062 grams

Tags

NGSS.HS-PS1-8

In the community described in the table, which of the following represents the respiratory energy (kcal/m²/year) used by autotrophic organisms? (Energy flow)

• 10

• 200

• 1600

• 2000

• 10000

Tags

NGSS.HS-LS2-5

A sample of radioactive waste has a half-life of 10 years and an activity level of 2 curies. After how many years will the activity level of this sample be 0.125 curie?

• 10 years

• 20 years

• 30 years

• 40 years

Tags

NGSS.HS-PS1-8

The current global human population is about 6.1 billion and is growing at an annual rate of 1.35 percent. If world population were to grow at that rate for the next year, approximately how many people would be added?

• 8 x 10^5

• 8 x 10^6

• 8 x 10^7

• 8 x 10^8

Tags

NGSS.MS-ESS3-4