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Cycles of Matter Practice

Total questions: 38

Worksheet time: 24mins

Name
Class
Date
1.
How does matter move among the living and nonliving parts of an ecosystem?
a)
matter is recycled within and between ecosystems
b)
one-way flow of energy
c)
two-way flow of energy only
d)
three-way flow of energy only
2.
Why does erosion release carbon into the atmosphere?
a)
Carbon is stored in the soil and when disturbed it will release it. 
b)
Carbon is stored in the clouds and when disturbed it will release it. 
c)
Carbon is stored in the water and when disturbed it will release it. 
d)
All are true!
3.
What is our role in the carbon cycle? 
a)
We are made of carbon. 
b)
We release it into the atmosphere when we breathe. 
c)
We release it into the atmosphere when using fossil fuels. 
d)
All of the above. 
4.
Where is the majority of nitrogen located?
a)
Most of the nitrogen on Earth is in the atmosphere.
b)
Most of the nitrogen on Earth is in the soil.
c)
Most of the nitrogen on Earth is in the water.
d)
None of the above.
5.
Carbon is found in the atmosphere in the form of 
a)
carbohydrates
b)
carbon dioxide
c)
calcium carbonate
d)
ammonia
6.
Which cycle is this?
a)
Carbon
b)
Nitrogen
c)
Phosphorus
d)
Water
7.
Which cycle is this?
a)
Carbon
b)
Nitrogen
c)
Phosphorus
d)
Water
8.

What organisms are part of the carbon cycle?

a)

plants

b)

animals

c)

bacteria

d)

all living things

9.

Burning fossil fuels affects which cycle..

a)

water cycle

b)

nitrogen cycle

c)

carbon cycle

d)

photosynthesis

10.

Plants use carbon dioxide in the process of _____________.

a)

decay

b)

shedding leaves

c)

photosynthesis

d)

respiration

11.

What is the main storage reservoir for water on Earth?

a)

A pool.

b)

The atmosphere.

c)

Lakes.

d)

Ocean.

12.

What are two ways that CO2 is released into the atmosphere?

a)

Vacuuming and dusting.

b)

Combustion and decomposition.

c)

Swimming and decomposition.

d)

None of the above.

13.

Matter cycles through the biotic and abiotic components of the Earth's ecosystems.

a)

True

b)

False

14.
How is the burning of fossil fuels related to global warming?
a)
Magic
b)
Fuels are hot
c)
Greenhouse effect
d)
Photosynthesis
15.

Which of the following removes carbon from the atmosphere?

a)

Combustion

b)

Respiration

c)

Photosynthesis

16.
All of the carbon in existence is continually recycled in the carbon cycle
a)
True
b)
False
17.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
18.
If the plant population decreased, the amount of carbon would _________.
a)
Stay the same
b)
Increase
c)
Decrease
19.

Carbon molecules cannot be created or destroyed

a)

True

b)

False

c)

Not enough information to answer

20.
What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
a)
nitrogen composition
b)
ammonia 
c)
nitrogen fixation
d)
denitrification
21.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
22.
Organisms that break down dead plants & animals and release nitrogen back into atmosphere...
a)
bacteria
b)
plants
c)
animals
d)
producers
23.
Organisms that need nitrogen to survive
a)
only plants
b)
only animals
c)
only bacteria
d)
all living organisms
24.

Plants and animals cannot use nitrogen directly from the air.

a)

True

b)

False

25.
What happens when organisms die and decay? 
a)
Their bodies are lifted up
b)
Their nitrogen returns to the soil
c)
they keep their nitrogen
d)
They stay on earth forever
26.
The process in which Nitrogen circulates and is recycled is called ____________
a)
The nitrogen cycle
b)
The water cycle
c)
The carbon cycle
d)
Nitrogen Fixation 
27.
_____ is the conversion of organic nitrogen into ammonia
a)
Nitrogen Fixation
b)
Ammonification
c)
Denitrification
d)
Assimilation 
28.

Bacteria fix nitrogen from the atmosphere into a form plants can use.

a)

True

b)

False

29.

What is the main reservoir of nitrogen?

a)

Water bodies

b)

Plants

c)

Atmosphere

d)

Soil

30.

What is denitrification?

a)

Conversation of nitrite back to nitrogen gas

b)

Conversation of ammonia back to nitrogen gas

31.

What is causing global warming? (Choose All That Apply)

a)

The earth is too close to the sun

b)

There is too much carbon dioxide in the atmosphere

c)

Because we're running out of water

d)

Because we're cutting down all the trees and not planting more

32.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
33.
Which of these is an example of precipitation?
a)
snow
b)
air
c)
clouds
d)
vapor
34.
Which is the opposite of condensation?
a)
runoff
b)
evaporation
c)
precipitation
d)
transpiration
35.
Snow, sleet, hail, and rain are all examples of  ________________. 
a)
evaporation
b)
condensation
c)
accumulation
d)
precipitation
36.
What is it called when WATER is FORMED from an LIQUID to a WATER VAPOR Oor an [GAS]?
a)
EVAPORATION
b)
PRECIPITATION
c)
TRANSPIRATION
37.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
38.
The ________ is the driving force of the earth's surface.
a)
sun
b)
moon 
c)
stars

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