Unit Test — Unit test Answers

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21
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Some consumers, like lions, do not eat plants or any other producers. They only eat other animals.How do lions obtain the carbon they need?

A
by eating animals that have carbon-based molecules stored in their bodies
B
by breathing it in from the atmosphere in the form of carbon dioxide
C
by absorbing carbon-based molecules through their skin from the soil
D
by drinking water that contains carbon dioxide
22
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Study the image.

Question illustration
A
The rock has fine grains.
B
The grains of the rock are sharp or jagged.
C
The rock is banded.
D
The bands of the rock run from the top to the bottom.
23

Which statement describes one role of minerals during cementation?

A
Minerals bind sediments together.
B
Compressed minerals form new rock.
C
Sediments dissolve and bind minerals together.
D
Spaces between minerals are filled with sediments.
24

During the formation of metamorphic rocks, what is one event that leads to increased heat?

A
Sun warms rocks.
B
Magma pockets rise.
C
Friction occurs between sliding rocks.
D
Lava at Earth’s surface flows over rocks.
26

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.
27

As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sandstone.What causes sandstone to change into metamorphic rock at Stone Mountain?

A
Sandstone is reshaped by erosion from a stream.
B
Sandstone builds up layers of sand at the mountain.
C
Sandstone experiences intense heat and pressure.
D
Sandstone has more sand particles compacted on top of it.
28

Which type of rock forms when molten material cools and hardens inside Earth?

A
an igneous rock
B
an extrusive rock
C
a rock with fine texture
D
a rock with small crystals
30

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.
31

During the formation of metamorphic rocks, what most likely causes pressure to increase?

A
Magma pockets rise.
B
Gravity pulls on rocks.
C
Rocks melt deep beneath Earth’s surface.
D
Rocks beneath Earth’s surface are forced toward the mantle.
32

These are two metamorphic rocks.

Question illustration
A
The rock on the right is foliated.
B
The rock on the left formed from granite.
C
The rock on the left is formed from cooled magma.
D
The rock on the right has randomly arranged grains.
33

Which describes gneiss?

A
igneous
B
formed from shells
C
tends to split along bands
D
grains randomly arranged
34

Which are the two agents that are necessary in the formation of metamorphic rocks?

A
erosion and heat
B
heat and lava
C
lava and pressure
D
pressure and heat
35

Which phrase describes foliated rocks?

A
tend to break in half
B
grains arranged randomly
C
tend to split apart along bands
D
grains arranged in increasing size
37

In the formation of metamorphic rocks, what effect do temperature and pressure primarily have?

A
They erode rocks.
B
They create layers.
C
They make rocks smaller.
D
They change existing minerals.
38

Which describes slate?

A
non-foliated
B
igneous
C
does not split into layers
D
grains arranged in parallel layers
39

The image shows metamorphic rock.

Question illustration
A
randomly arranged grains
B
formed through sedimentation
C
formed by extreme heat and pressure
D
grains that do not split into layers
40

The image shows an example of a sedimentary rock.

Question illustration
A
the varying sizes of its rock fragments
B
the visible pieces of sediment it contains
C
the ocean animals deposited in its layers
D
the crystals of dissolved minerals it contains

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