ES Biogeochemical Cycle Test Review

Which of the following example(s) release CO2 into the air? (select all that apply)

• burning fossil fuels

• volcanic eruptions

• photosynthesis

• respiration

Is CO2 a natural greenhouse gas?

• yes

• no

Deforestation affects the carbon cycle by

• increasing the amount of oxygen produced and increasing the amount of carbon dioxide leaving the atmosphere

• decreasing the amount of oxygen produced and increasing the amount of carbon dioxide leaving the atmosphere

• decreasing the amount of oxygen produced and decreasing the amount of carbon dioxide leaving the atmosphere

• increasing the amount of oxygen produced and decreasing the amount of carbon dioxide leaving the atmosphere

Deforestation affects the water cycle because

• transpiration declines and precipitation patterns change.

• transpiration increases and precipitation patterns change.

• transpiration declines but precipitation patterns remain constant.

• transpiration increases but precipitation patterns remain constant.

Decomposers break down organisms to help resupply these with important chemicals except for which of the following?

• the soil

• water

• organisms

• air

Producers use_______ to make food and then consumers use ______ and eat their food.

• CO2, Oxygen

• Oxygen, CO2

• CO2, water

• Water, CO2

Which of the following are not legumes, and therefore do not have bacteria on their root nodules to fix the nitrogen?

• clover

• beans

• strawberries

• alfalfa

True/False: plants can use nitrogen gas that is in the atmosphere without changing it.

• true

• false

Eutrophication (increase in algae) can be caused by

• Human activity interfering with the nitrogen cycle

• Human activity interfering with the water cycle

• Human activity interfering with the carbon cycle

Water from a vapor to a liquid is called

• evaporation

• condensation

• sublimation

• freezing