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Water, Carbon, & Nitrogen Cycles

Total questions: 30

Worksheet time: 23mins

Name
Class
Date
1.

Which of the following vocab words are used when describing the water cycle?

a)

precipitation

b)

condensation

c)

fixation

d)

respiration

e)

evaporation

2.

Which of the following vocab words is used when discussing the nitrogen cycle?

a)

Fixation

b)

Condensation

c)

Evaporation

d)

Respiration

3.

We discussed two ways nitrogen fixation occurs. The first is lightening, the second is...

a)

fossil fuels.

b)

sheep.

c)

carbon.

d)

bacteria.

4.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
5.
What is it called when rainwater contributes to the flow of rivers and streams?
a)
Transformation
b)
Runoff
c)
Irrigation
d)
Desertification
6.
When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.
a)
Water
b)
Atmosphere
c)
Sun
d)
Air
7.

In the carbon cycle, _______ removes carbon from the atmosphere and ______ returns it to the atmosphere.

a)

evaporation, combustion

b)

respiration, photosynthesis

c)

photosynthesis, respiration

d)

evaporation, fixation

8.
Carbon dioxide is produced by the burning of fossil fuels
a)
True
b)
False
9.
Which of the following is an example of a decomposer?
a)
Owl
b)
Fish
c)
Tree
d)
Mushroom
10.
When plants lose water into the atmosphere as a gas, this is called. . .
a)
evaporation
b)
condensation
c)
precipitation
d)
transpiration
11.

Which is a true statement?

a)

Humans depend on oxygen, plants depend on carbon dioxide

b)

Plants produce carbon dioxide

c)

Humans depend on carbon dioxide, plants depend on oxygen

d)

Humans don't depend on plants for the air they need

12.
How do plants get the nitrogen they need?
a)
from the air
b)
from the soil or water in which they live
c)
from the Sun
d)
from broken-down rocks
13.
Nitrogen fixing bacteria, lives in nodules on the root of a plant called
a)
Broccoli
b)
Legumes
c)
Beats
d)
Carrots
14.
Animals obtain the nitrogen they need directly from the
a)
soil in their habitat
b)
air they breathe
c)
plants they eat
d)
bacteria living within them
15.
Plants and animals cannot use nitrogen directly from the air.
a)
True
b)
False
16.
What converts nitrogen into a useable form for plants and animals?
a)
bacteria
b)
fungi
c)
rain
17.
How nitrogen is "fixed" into useable form for plants
a)
through action of bacteria
b)
through lightning
c)
through action of bacteria & lightning
d)
through photosynthesis
18.
Building proteins and DNA is the reason organisms need what substance?
a)
Water
b)
Carbon
c)
Nitrogen
d)
Calcium
19.
What is one of the most important processes that removes carbon from the atmosphere? 
a)
photosynthesis
b)
cellular respiration
c)
erosin
d)
soil respiration
20.

When water vapor in the atmosphere cools and changes into water droplets that form clouds

a)

Accumluation

b)

Condensation

c)

Evaporation

d)

Precipitation

21.

Water droplets fall from the atmosphere in the form of rain, snow, sleet, or hail

a)

Accumluation

b)

Condensation

c)

Evaporation

d)

Precipitation

22.

During respiration, we take in ______________ and breath out ________________.

a)

Carbon Dioxide/Oxygen

b)

Oxygen/carbon Dioxide

23.

How do animals and people get the nitrates they need?

a)

By eating plants

b)

By eating animals that eat plants.

c)

Both

d)

None of the above.

24.

What transforms nitrates back into nitrogen in the Nitrogen Cycle?

a)

Plants

b)

Decomposers

c)

The sun

d)

The air

25.

Which of the following release carbon into the atmosphere? (Select all correct answers)

a)

Forest fires

b)

Burning fossil fuels

c)

Photosynthesis

d)

Human and other animals breathing out CO2

26.

CO2 is another way to write ___________________

a)

Carbon dioxide

b)

Carbon monoxide

c)

Dihydrogen oxide

d)

Oxygen

27.

An increase in temperature results in an increased rate of...

a)

fixation.

b)

evaporation.

c)

precipitation.

d)

students wearing shorts to school even though it's still below freezing overnight.

28.

_____ is the part of the carbon cycle when a previously living thing is broken down by bacteria, fungi, earthworms, etc and returns to the soil.

a)

Condensation

b)

Respiration

c)

Decomposition

d)

Photosynthesis

29.

Earth's atmosphere (air) is made up of ~78% ______ gas.

a)

nitrogen

b)

oxygen

c)

hydrogen

d)

carbon

30.

The two main parts of the carbon cycle are photosynthesis and respiration. The word equation for this is ____ + water + sunlight -> ____ + glucose + energy.

a)

Carbon Dioxide, nitrogen

b)

nitrogen, oxygen

c)

oxygen, carbon dioxide

d)

carbon dioxide, oxygen