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Carbon Cycle

Total questions: 26

Worksheet time: 18mins

Name
Class
Date
1.
What does NOT produce carbon dioxide?
a)
Photosynthesis
b)
Burning Fossil Fuels
c)
Animal respiration
d)
Plants decaying
2.
Combustion is another word for __________.
a)
Transportation
b)
Respiration
c)
Fossil Fuels
d)
Burning
3.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
4.
Carbon can be found in...
a)
The atmosphere
b)
Soil
c)
Fossil fuels
d)
All of the above
5.
Which of the following removes carbon from the atmosphere?
a)
Combustion
b)
Respiration
c)
Photosynthesis
d)
Death
6.

Which of the following are fossil fuels?

a)

Coal, water, oil

b)

Oxygen, coal, oil

c)

Coal, Oil, Natural Gas

d)

None of the above

7.
Which of the following is the best conclusion that can be made from this graph?
a)
atmospheric carbon dioxide levels have been decreasing since 1960
b)
Hawaii has a lot of carbon dioxide
c)
humans have been working hard to decrease carbon dioxide levels
d)
atmospheric carbon dioxide levels have increased steadily since 1960
8.
When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.
a)
Water
b)
Atmosphere
c)
Sun
d)
Air
9.

The circulation of the element Carbon among Earth's atmosphere, land, oceans, and organisms is called _____________.

a)

the Carbon Cycle

b)

the Oxygen Cycle

c)

the Carbon dioxide Cycle

d)

the Water Cycle

10.

Plants use ____________ to make their own food

a)

Water

b)

Sunlight

c)

Carbon dioxide

d)

All of these

11.

Over ________________ of years, once-living matter that remains in the ground can transform into fossil fuels.

a)

millions

b)

hundreds

c)

thousands

d)

a few handful

12.

How does the human body return carbon to the atmosphere in the carbon cycle?

a)

Waste products

b)

Photosynthesis

c)

Cellular respiration

d)

Formation of glucose

13.

Which of the following is an example of human impact on the carbon cycle?

a)

The increased production of methane gases from cattle farms

b)

The burning of fossil fuels

c)

The cutting down of trees for lumber

d)

Driving automobiles

e)

All of the above

14.

If a forest fire occurs, what will happen to the carbon in the forest?

a)

It will go into the soil

b)

It will go into the atmosphere

c)

It will runoff into nearby streams and rivers

d)

It will be destroyed

15.
TRUE or FALSE?
All of the carbon in existence is continually recycled in the carbon cycle.
a)
True
b)
False
16.

How do animals get carbon?

a)

By eating plants and or other animals.

b)

They absorb it from the atmosphere.

c)

From the ground

d)

They do not get carbon from anywhere.

17.

What are fossil fuels made from?

a)

Plants and animals that are buried underground for millions of years.

b)

They absorb it from the atmosphere.

c)

Water

d)

Wind

18.
Why does cutting down trees increase global warming?
a)
trees soak up carbon dioxide
b)
trees provide shade which counteracts global warming
c)
trees absorbs the sun's energy without radiating back into the atmosphere
d)
trees drain greenhouse gases like methane from soil
19.

Which of the following have been linked to climate change?

a)

droughts

b)

flooding

c)

melting of polar ice caps

d)

all of the above

20.

Which food source would contribute to climate change the least?

a)

Corn

b)

Eggs

c)

Pork

d)

Beef

21.

Since the mid- 1800's, _____________ activity has significantly altered the carbon cycle.

a)

animal

b)

plant

c)

unknown

d)

human

22.

Which organisms carry out photosynthesis?

a)

producers

b)

herbivores

c)

carnivores

d)

decomposers/detritivores

23.

Which of the following process(es) remove carbon from the atmosphere?

a)

photosynthesis

b)

cellular respiration

c)

evaporation

d)

combustion

e)

precipitation

24.

Which of the following process(es) add carbon to the atmosphere?

a)

photosynthesis

b)

cellular respiration

c)

evaporation

d)

combustion

e)

precipitation

25.

Which of the following is a product of photosynthesis?

a)

water / H2O

b)

glucose (C6H12O6)

c)

carbon dioxide (CO2)

d)

energy

26.
How does carbon affect global warming?
a)
Speeds up the effects of global warming
b)
Slows down the effects of global warming
c)
Does nothing to the speed of global warming
d)
Global warming is FAKE

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