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Worksheets3.4 Bio
Total questions: 17
Worksheet time: 20mins
Name
Class
Date
1.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
2.
On which kind of day would you expect the most evaporation from the surface of a pond?
a)
cold, rainy
b)
cold, sunny
c)
warm, rainy
d)
warm, sunny
3.
What is one way that carbon enters the atmosphere?
a)
Sunlight
b)
Factory emissions
c)
Ocean uptake
d)
Rain
4.
Do plants support the carbon cycle?
a)
Yes
b)
No
5.
Which of the following removes carbon from the atmosphere?
a)
Combustion
b)
Respiration
c)
Photosynthesis
d)
Death
6.
78% of the atmosphere is nitrogen
a)
True
b)
false
7.
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
8.
When carbon combines with oxygen, what forms?
a)
Nitrogen
b)
Argon
c)
Carbon dioxide
d)
Sodium hydrogen
9.
What is the purpose of carbon dioxide?
a)
To cool down our planet
b)
To block out UV rays
c)
To trap heat andwarm up our planet
d)
To let sunlight escape
10.
Carbon ....
a)
is the least common element in all living things.
b)
is found only in the atmosphere and rocks.
c)
is the most common element in all living things.
d)
can form 4 bonds and join with many other atoms.
11.
Carbon in living organisms and their wastes that fall to the floor of the ocean can become
a)
water
b)
seaweed
c)
air
d)
fossil fuels or rocks
12.
Where does the carbon cycle begin?
a)
Plants
b)
Dead organisms
c)
Sunlight
d)
In the air
13.
Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert
a)
nitrates intro nitrogen gas
b)
ammonia into proteins
c)
nitrogen gas into ammonia
d)
proteins into nitrates
14.
What effect will an increase in ocean phytoplankton have on the carbon cycle?
a)
more carbon will leave the atmosphere
b)
more carbon will enter the atmosphere
c)
less carbon will leave the atmosphere
d)
less carbon will enter the atmosphere
15.
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
16.
Growing legumes such as alfalfa or soy beans increases
a)
denitrification
b)
nitrogen fixation
c)
ammonification
d)
ammonium oxidation
17.
What happens to the nitrogen excreted by animals?
a)
Nitrates are reabsorbed by the animal.
b)
Nitrogen is converted into ammonia.
c)
Nitrogen is released back into the environment.
d)
Nitrates are converted into proteins.
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