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Question

Materials in sedimentary cycles

a. pass through both a solid and a gaseous phase.

b. are never present as gases in the ecosystem.

c. are present as liquids in Earth but as gases in the atmosphere.

d. involve all of the above.

Which of the following does NOT cycle through an ecosystem?

a. water

b. carbon

c. energy

d. phosphorus

The chemical elements that are available to producers are usually in what form?

a. ions

b. gases

c. solids

d. compounds

Most of the water vapor in Earth's atmosphere comes from evaporation from

a. lakes.

b. rivers.

c. land.

d. oceans.

Which gas is increasing in the atmosphere and threatening the world with the greenhouse effect?

a. carbon dioxide

b. carbon monoxide

c. ozone

d. fluorocarbons

Answer 1

1.Materials in sedimentary cycles

C. are present as liquids in Earth but as gases in the atmosphere.

2.Which of the following does NOT cycle through an ecosystem?

d. phosphorus

3.The chemical elements that are available to producers are usually in what form?

d. compounds

4.Most of the water vapor in Earth's atmosphere comes from evaporation from

d. oceans.

5. Which gas is increasing in the atmosphere and threatening the world with the greenhouse effect?

a. carbon dioxide