Populations and the Environment

Question 1

What is a biogeochemical cycle?

Revolt · Accepted Answer

D: a process that recycles elements and other matter through the biosphere

Question 2

A is a chemical substance that organisms require to live.

Revolt · Accepted Answer

B: nutrient

Question 3

A serves as a long-term storage area for water or nutrients.

Revolt · Accepted Answer

reservoir

Question 4

Water changes from a gas to a liquid phase. Water falls to the Earth in the form of a liquid or solid. Liquid water changes into a gas. Water evaporates from the leaves of plants.

Revolt · Accepted Answer

A: condensation

Question 5

Bacteria in the soil converts this nutrient into a usable form. Plants take up the usable nutrient through the soil and assimilate it into proteins, making it part of the plant. An animal eats the plants, and the nutrient becomes part of the animal. When the animal dies, it decomposes, returning the nutrient back to the soil. Which cycle is being described?

Revolt · Accepted Answer

C: nitrogen cycle

Question 6

Bacteria convert ammonia into nitrates. Bacteria convert nitrates into nitrogen gas. Bacteria convert nitrogen gas into ammonia.

Revolt · Accepted Answer

C: nitrification

Question 7

Part of all organic compounds Component of bones and found in cell membranes Important component of proteins, like carbon Universal solvent

Revolt · Accepted Answer

B: carbon

Question 8

Water Carbon Nitrogen Phosphorous

Revolt · Accepted Answer

Selection 1: no; Selection 2: no; Selection 3: yes; Selection 4: yes

Question 9

Fossil fuels are normally stored in a reservoir deep in the Earth. The carbon in fossil fuels, including coal and oil, are essentially locked out of the natural carbon cycle due to their location deep in the Earth. Humans have found a way to access and utilize this carbon. Identify a risk for accessing this carbon.

Revolt · Accepted Answer

C: Scientists are not sure if the atmosphere can handle all of the excess carbon.

Question 10

The cycle is not a nutrient cycle.

Revolt · Accepted Answer

A: water

Populations and the Environment Answers

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