AnswersEarth and Space A 26-27Populations and the Environment

Populations and the Environment — Unit test Answers

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1
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The image shows sedimentary rock layers.

Question illustration
A
1
B
2
C
3
D
4
2
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Which period belongs to the Paleozoic era and not the Cenozoic era?

A
Devonian
B
Neogene
C
Paleogene
D
Quaternary
3

The diagram illustrates the water cycle.

Question illustration
A
U
B
W
C
X
D
Y
4

Which statement describes competition within a population?

A
Several killer whales migrate to a new location.
B
Two male sea horses fight to win over a female.
C
Several elk travel together to find and share water.
D
Different kinds of garden plants take in water from the soil.
5

Which phrase describes one main feature of the atmosphere?

A
protects Earth’s surface
B
includes organisms in the air, on land, and in water
C
consists of rocks, minerals, landforms, and Earth’s interior
D
comprises oceans, lakes, rivers, streams, and groundwater
6

Which statement describes abiotic factors in an environment?

A
Chickens run around a farm.
B
Soil retains water and nutrients.
C
Bacteria use energy to reproduce.
D
Plants compete for sunlight in an ecosystem.
7

Which organisms release carbon dioxide as waste?

c
consumers only
c
consumers and decomposers
p
producers and decomposers
p
producers only
8

What determines the length of a geologic time period?

A
fossil record
B
material density
C
meteors and rocks
D
radioactive materials
9

Humans’ use of rocks and minerals as building materials is an example of which interaction?

A
an interaction within the geosphere
B
an interaction within the hydrosphere
C
an interaction between the biosphere and the geosphere
D
an interaction between the biosphere and the atmosphere
10

Which characteristic of potassium makes it useful for dating rocks?

A
It has a long half-life.
B
It decays at an unknown rate.
C
It produces lead as it breaks down.
D
It can be used to date all types of rock.
11

The image shows locations of fossils from different geologic periods in Virginia.Which association correctly links the time period with the location of the fossils?

Question illustration
A
Pennsylvanian eastern and western Virginia
Option A
B
Cambrian throughout southern Virginia
Option B
C
Tertiary eastern Virginia
Option C
D
Quaternary eastern and western Virginia
Option D
13

Study the timeline.

Question illustration
A
5 million years
B
200 million years
C
1.5 billion years
D
4.5 billion years
14

Which phrase describes a population?

A
a group of different communities in an area
B
organisms of the same species living in an area
C
nonliving things that interact with living things in a region
D
organisms that belong to the same community within a region
15

Which statement describes an interaction between the biosphere and the hydrosphere?

A
Plant roots take in water through their roots.
B
Plants take in carbon dioxide from the air.
C
Energy stored in plants is transferred to humans and animals that eat them.
D
Plants make food through photosynthesis and release oxygen into the atmosphere.
16

Which method preserves an image of a leaf?

A
The leaf turns into rock over time.
B
Tree sap flows over the leaf and preserves it.
C
Sediment covers the leaf and leaves an imprint on the rock.
D
As the leaf decomposes, carbon from the leaf is left on the rock.
17

Which are abiotic factors as well as basic needs that living things compete for?

A
bacteria and water
B
fungi and bacteria
C
pollen and sunlight
D
sunlight and water
18

Which important event in Earth’s history occurred during the Jurassic period?

T
The first birds emerged on Earth.
M
Mammals were in search of food.
A
Animals with shells emerged on Earth
T
Treelike ferns first began to grow and populate.
19

Which landform is part of the cryosphere?

A
glacier
B
lake
C
ocean
D
river

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