AnswersPBCSD_Grade_Forgiveness_2001340_Environmental_Science_S1_2020Unit Test

Unit Test — Unit test Answers

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1
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What is the source of energy in most ecosystems?

A
animals
B
plants
C
oxygen
D
sunlight
2
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Water is an abiotic factor in terrestrial environments.

A
T
B
F
3

Kendra is studying the energy pyramid shown.

Question illustration
A
The ecosystem can support fewer foxes than grasshoppers.
B
Foxes require less energy than birds.
C
The ecosystem can support more foxes than birds.
D
Grasshoppers require more energy than birds.
4

Echolocation is an adaptation bats use to _______.

A
hunt insects in flight
B
locate flowering plants
C
find warm places for hibernation
D
all of the above
5

Which of the following did not allow researchers to further explore below the ocean’s surface?

A
ROV’s
B
Alvin
C
Palomares
D
Bathysphere
6

Which of the following is a possible reason for migration?

A
microevolution
B
diminished food supply
C
increased ecosystem stability
D
macroevolution
7

What is a possible cause for a decrease in ecosystem productivity?

A
an increase in the biodiversity of the ecosystem
B
a decrease of the biodiversity of an ecosystem
C
the biodiversity of an ecosystem experiencing no change
D
an ecosystem becoming more stable
8

Which molecule would be the most affected by limited nitrogen?

A
myofibrillar proteins in muscle
B
glucose molecules in starch
C
fat molecules surrounding organs
D
cellulose molecules in plant cell walls
9

Which of the following statements about the effects of agricultural techniques on the environment is true?

A
Fertilizer used for agriculture can enter bodies of water, causing eventual oxygen depletion.
B
Pesticides and herbicides are potentially harmful to bodies of water only before they degrade.
C
Agricultural practices have limited impact on the surrounding environment.
D
Tillage is an important agricultural practice that has no known environmental impact.
10

The open ocean, sea floor, and coral reefs are all examples of habitats with high rates of primary production.

A
T
B
F
11

Large-scale environmental catastrophes _______.

A
result from human activities
B
have a negative impact on ecosystems
C
affect a variety of environmental factors
D
all of the above
12

Which level of consumer has access to the smallest supply of energy?

A
primary
B
secondary
C
tertiary
D
quaternary
13

Which of the following adaptations is typical of marine mammals?

A
thick layer of blubber
B
body covered in thick fur
C
webbed hands and feet
D
breathing apparatus on the sides of the head
14

Wolves are predators of deer. What is most likely to happen to the deer population if the wolf population increased?

A
stay the same
B
increase
C
decrease
D
become extinct
15

How do natural disasters weaken a community’s social infrastructure?

A
Social systems are unbalanced by the damage caused by natural disasters.
B
Natural disasters tend to target the poorest members of a community.
C
The number of natural disasters is increasing across the globe.
D
Natural disasters can cause billions of dollars in property damage.
16

It is best to say that the protection to properties offered by sea walls along coasts _______.

A
decreases the present and future risk to human properties
B
increases both the present and future risk to human properties
C
decreases the present but increases the future risk
D
increases the present but decreases the future risk
17

Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 19902000Lions100,00047,000Cheetahs25,0007,500Zebras750,000450,000Which explanation is best supported by the numbers in the chart?

A
Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs.
B
The dwindling zebra population has led to the decline of the predator lion and cheetah populations.
C
Overhunting of lion and cheetah populations has led to a decline in the food source population.
D
Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions.
18

Which describes a way in which phosphorus may enter into the phosphorus cycle?

A
Earthquakes release phosphorus.
B
Phosphorus is carried in the rain that was evaporated from lakes.
C
Human use of fertilizers release phosphorus into the groundwater.
D
Phosphorus is transpired from the leaves of plants.
19

Which sequence of processes transports water from the atmosphere to the ocean and then back into a cloud?

A
precipitation ® condensation ® transpiration
B
evaporation ® condensation ® sublimation
C
precipitation ® evaporation ® condensation
D
evaporation ® precipitation ® condensation
20

Which characteristic best distinguishes runoff and infiltration?

A
Runoff involves condensation and infiltration involves evaporation.
B
Runoff occurs over land and infiltration occurs underground.
C
Runoff occurs during floods and infiltration occurs during drought.
D
Runoff describes water movement and infiltration describes water storage.

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