5th Grade - SCIENCE - Chapter 8 TEST

Question 1

True or false

Mann cannot destroy what God has created and is maintaining

Answer 1

Ture

Question 2

True or false

All stressors are man-made

Answer 2

False

Question 3

True or false

Man honors God by using his resources wisely

Answer 3

True

Question 4

True or false

Photosynthesis and respiration are part of the nitrogen cycle.

Answer 4

False

Question 5

True or false

Areas of the earth that have only two seasons usually have a wet season and a dry season.

Answer 5

Ture

Question 6

True or false

Fires are never beneficial to an ecosystem.

Answer 6

false

Question 7

True or false

Consumers get nitrogen compounds by eating other animals or plants.

Answer 7

True

Question 8

True or false

Carbon dioxide is released into the air during decomposition.

Answer 8

True

Question 9

A _____ is a regular pattern of change.

Answer 9

cycle

Question 10

Nitrogen is most often changed into usable compounds by _____.

Answer 10

bacteria

Question 11

Regular division of the year are called _____.

Answer 11

seasons

Question 12

During _____, plants take in carbon dioxide and release oxygen.

Answer 12

photosynthesis

Question 13

The water cycle includes precipitation, transpiration, _____ and condensation.

Answer 13

evaporation

Question 14

During _____, people and animals breathe in oxygen and breathe out carbon dioxide.

Answer 14

respiration

Question 15

In many parts of the earth, the ____ changes as the seasons change.

Answer 15

temperature

Question 16

Plants release water vapor into the air through ____.

Answer 16

transpiration

Question 17

The largest man-made stress is probably _____.

Answer 17

habitat destruction

Question 18

A _____ is any physical hazard to life caused by having too much or too little of things needed for life.

Answer 18

stress

Question 19

This occurs whenever an ecosystem receives more water than it can store or use.

Answer 19

monsoon

Question 20

A _____ occurs whenever an ecosystem receives less water than it needs.

Answer 20

drought

Question 21

The gradual changes in the populations or organisms in an ecosystem are called _____.

Answer 21

succession

Question 22

Plant and animal species that originally live in an ecosystem are called _____.

Answer 22

native species

Question 23

A species is considered ____ when it last known member dies.

Answer 23

extinct

Question 24

A species becomes _____ when its population is so small that the species may soon become extinct.

Answer 24

endangered

Question 25

Species that are not native to an ecosystem and can cause harm are ____.

Answer 25

invasive

Question 26

How is a drought different from other natural disasters?

Answer 26

It does not have a definite beginning or ending.

Question 27

What is one problem that invasive species can bring to an ecosystem?

Answer 27

• increased number of predators of a native species
• diseases
• increased competition for food and water

Question 28

Give examples of how two cycles are dependent on each other

Answer 28

• water is needed for the water cycle and for the carbon cycle during photosynthesis
• precipitation is part of the water cycle and also carries nitrogen compounds down to earth
• In autumn, the leaves fall and decay. Bacteria breakdown the leaves to form nitrogen compounds. During Spring, plants grow and produce new leaves, which are needed for photosynthesis to occur.