Cycles of Matter

Question 1

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen.

Revolt · Accepted Answer

absorb from soil

Question 2

Which best compares the roles of nitrogen-fixing bacteria and certain decomposers in the nitrogen cycle?

Revolt · Accepted Answer

The bacteria convert free nitrogen into nitrogen-containing compounds, while the decomposers convert nitrogen-containing compounds into free nitrogen.

Question 3

Which best describes a role of animals in the water cycle?

Revolt · Accepted Answer

They release water vapor when they exhale.

Question 4

Some bacteria live in the roots of plants like soybeans and peas.

Revolt · Accepted Answer

to convert free nitrogen into usable nitrogen

Question 5

Scott made a model of the water cycle by filling a tub with water, covering the tub with clear plastic, and placing a heat lamp over the tub. After a few days, he observed water droplets collecting on the plastic wrap.What process formed the water droplets in Scott’s model?

Revolt · Accepted Answer

condensation

Question 6

Which process occurs when bacteria converts nitrogen gas to a usable form?

Revolt · Accepted Answer

fixation

Question 7

How is the nitrogen cycle important to humans?

Revolt · Accepted Answer

It converts nitrogen into a form that humans can obtain by eating other organisms.

Question 8

water vaporgroundwaterrunoffcondensation

Revolt · Accepted Answer

groundwater

Question 9

During which process of the water cycle does water change from a gas to a liquid?

Revolt · Accepted Answer

condensation

Question 10

precipitationtranspirationevaporationcondensation

Revolt · Accepted Answer

condensation

Cycles of Matter Answers

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