AP Environmental Science Math

Front

What is the efficiency rating of an incandescent light bulb?

Back

The efficiency rating of an incandescent light bulb is typically around 5 percent.

Front

If an incandescent light bulb consumes 1.00 joules of electrical energy, how much light energy is produced?

Back

0.05 joules of light energy.

Front

What is half-life in the context of radioactive decay?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

Front

If a radioactive sample has a half-life of 10 years, how long will it take for the activity level to drop from 2 curies to 0.125 curie?

Back

40 years.

Front

How much carbon dioxide is produced by the combustion of one gallon of automobile fuel?

Back

About 5 pounds of carbon dioxide (CO2).

Front

If one auto gets 20 miles per gallon and another gets 30 miles per gallon, how much less CO2 will the second auto produce on a 600-mile trip?

Back

50 lbs.

Front

What is the formula to calculate the annual percentage growth rate of a population?

Back

Annual growth rate = (Crude birth rate - Crude death rate) / 10.

Front

What is the crude birth rate of a population if it is 46?

Back

The crude birth rate is the number of live births per 1,000 people in a year.

Front

What is the crude death rate of a population if it is 12?

Back

The crude death rate is the number of deaths per 1,000 people in a year.

Front

If a population has a crude birth rate of 46 and a crude death rate of 12, what is its annual growth rate?

Back

3.4%.