Answers2001310 Earth Science Sem 1 - ReevesCycles of Matter

Cycles of Matter Answers

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1
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Which human activity would most likely decrease the amount of carbon in the atmosphere?

A
clearing forests
B
heating coal
C
burning wood
D
planting trees
2
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Chen drew a diagram to compare the ways in which different organisms obtain nitrogen.

Question illustration
A
take in from atmosphere
B
produce themselves
C
eat other organisms
D
absorb from soil
3

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

Question illustration
A
to absorb nitrogen-containing compounds from the soil
B
to release free nitrogen into the atmosphere
C
to break down nitrogen-containing compounds in dead organisms
D
to convert free nitrogen into usable nitrogen
4

Which processes result in the release of carbon? Select three options.Animals break down food molecules to obtain energy.The remains of producers are broken down by decomposers.The remains of consumers are broken down by soil decomposers.Producers take in carbon dioxide.Producers make sugars and starches.

A
Animals break down food molecules to obtain energy.
B
The remains of producers are broken down by decomposers.
C
The remains of consumers are broken down by soil decomposers.
D
Producers take in carbon dioxide.
E
Producers make sugars and starches.
5

How is the nitrogen cycle important to humans?

A
It produces free nitrogen that can remove carbon dioxide from the atmosphere.
B
It converts nitrogen into a form that humans can obtain by eating other organisms.
C
It produces nitrogen compounds that humans can breathe.
D
It converts nitrogen into a form that humans can obtain by absorbing it through their skin.
6

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

A
They help water vapor condense when they produce waste.
B
They help water vapor condense when they inhale.
C
They release water vapor through transpiration.
D
They release water vapor when they exhale.
7

Kate wrote the steps of the carbon cycle to describe how carbon is cycled through specific organisms. The steps are in random order.1 - The rabbit decomposes.2 - The rabbit eats the carrot plant. 3 - The carrot plant takes in carbon dioxide from the air during photosynthesis.4 - Carbon compounds are returned to the soil.

A
2, 3, 1, 4
B
3, 2, 1, 4
C
3, 4, 2, 1
D
2, 4, 3, 1
8

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

A
precipitation
B
condensation
C
transpiration
D
evaporation
9

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

A
decomposition
B
condensation
C
fixation
D
transpiration
10

water vaporgroundwaterrunoffcondensation

A
water vapor
B
groundwater
C
runoff
D
condensation
11

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

A
decomposition
B
condensation
C
fixation
D
transpiration
12

How is the nitrogen cycle important to humans?

A
It produces free nitrogen that can remove carbon dioxide from the atmosphere.
B
It converts nitrogen into a form that humans can obtain by eating other organisms.
C
It produces nitrogen compounds that humans can breathe.
D
It converts nitrogen into a form that humans can obtain by absorbing it through their skin.
13

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

A
They help water vapor condense when they produce waste.
B
They help water vapor condense when they inhale.
C
They release water vapor through transpiration.
D
They release water vapor when they exhale.
14

Cleo has a vegetable garden and wants to increase the amount of nitrogen in the soil.How can she most likely do this?

A
add several soybean plants to her garden
B
decrease the amount of fertilizers she uses
C
harvest the vegetable plants continuously
D
reduce the number of decomposers that live in the soil
15

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

Question illustration
A
to absorb nitrogen-containing compounds from the soil
B
to release free nitrogen into the atmosphere
C
to break down nitrogen-containing compounds in dead organisms
D
to convert free nitrogen into usable nitrogen
16

Kate wrote the steps of the carbon cycle to describe how carbon is cycled through specific organisms. The steps are in random order.1 - The rabbit decomposes.2 - The rabbit eats the carrot plant. 3 - The carrot plant takes in carbon dioxide from the air during photosynthesis.4 - Carbon compounds are returned to the soil.

A
2, 3, 1, 4
B
3, 2, 1, 4
C
3, 4, 2, 1
D
2, 4, 3, 1
17

[BLANK]

A
precipitation
B
transpiration
C
evaporation
D
condensation
18

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

Question illustration
A
take in from atmosphere
B
produce themselves
C
eat other organisms
D
absorb from soil
19

Which human activity would most likely decrease the amount of carbon in the atmosphere?

A
clearing forests
B
heating coal
C
burning wood
D
planting trees
20

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

A
Both organisms convert free nitrogen into nitrogen-containing compounds.
B
Both organisms convert nitrogen-containing compounds into free nitrogen.
C
The bacteria convert free nitrogen into nitrogen-containing compounds, while the decomposers convert nitrogen-containing compounds into free nitrogen.
D
The bacteria convert nitrogen-containing compounds into free nitrogen, while the decomposers convert free nitrogen into nitrogen-containing compounds.

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