Log in
Sign up for FREE
arrow_back
Library

z1.06 Unit 1 Test MOD 25-26

star
star
star
star
star
Last updated about 3 hours ago
21 questions
Required
9
Required
2
Required
2
Required
1
Required
2
Required
2
Required
2
Required
4
Required
2
Required
4
Required
2
Required
2
Required
2
Required
2
Required
2
4
Required
2
Required
2
Required
2
Required
2
Required
8
Question 1
1.
This is a diagram of the carbon cycle.

Label the arrows with the processes they represent.
Other Answer Choices:
decomposition
photosynthesis
cellular respiration
burning of fossil fuels
Question 2
2.

Question 3
3.

Question 4
4.

Question 5
5.

Question 6
6.

Question 7
7.

Question 8
8.

Give 1 example of a carbon sink.

Question 9
9.

Question 10
10.

Give 1 example of a carbon source.

Question 11
11.

Question 12
12.

Question 13
13.

Question 14
14.

Question 15
15.

Question 16
16.

Question 17
17.

Question 18
18.
Decomposing plant and animal matter __________ the amount of carbon in the soil.
Question 19
19.

Question 20
20.

Question 21
21.

In your own words, how does cutting down trees affect the amount of carbon in the atmosphere?

The gases that make up Earth's atmosphere have changed over time. Scientists measure the levels of carbon dioxide (CO2) in Earth's atmosphere.

The simplified Carbon Cycle Model shows locations where carbon is stored and processes that move carbon from one location to another.
Scientists can use carbon cycle models to help make predictions about the amounts of carbon in different locations.

Use this Carbon Cycle Model to identify all the processes that would decrease CO2 in the atmosphere if the rates of these processes were to increase.
photosynthesis
fossil fuel combustion
diffusion in the ocean
diffusion in the atmosphere
Which carbon compound is considered a greenhouse gas?
calcium carbonate (CaCO3)
glucose (C6H12O6)
carbon dioxide (CO2)
What effect has the increasing amounts of carbon compounds in the atmosphere had on the Earth?
Increasing fossil fuel production
Decreasing average temperatures
Rising average temperatures
Which carbon compound is used to build the shells of sea creatures?
calcium carbonate (CaCO3)
glucose (C6H12O6)
carbon dioxide (CO2)
Which process does NOT release carbon into the atmosphere?
Respiration
Photosynthesis
Combustion
What happens in a carbon sink?
Carbon is permanently stored
More carbon is released than absorbed
More carbon is absorbed than released
What happens in a carbon source?
Carbon is permanently stored
More carbon is released than absorbed
More carbon is absorbed than released
Carbon remains constant
How do heterotrophs obtain the carbon compounds they need?
Eating plants (or animals that eat plants)
Photosynthesis
Burning fossil fuels
What process releases carbon into the atmosphere from fossil fuels?
Combustion
Respiration
Photosynthesis
What determines if the carbon cycle is in balance?
When carbon movement into the atmosphere equals movement out
When all reservoirs contain equal amounts of carbon
When carbon only moves in one direction
Which natural process adds CO2 to the atmosphere from Earth's interior?
Earthquakes
Volcanic eruptions
Ocean currents
When do atmospheric CO2 levels typically begin to decrease?
Spring
Fall
Winter
Why does atmospheric CO2 typically decrease during the season you selected in the previous question?
There are fewer plants performing photosynthesis and using carbon
Animals breathe more and produce more carbon
There are more plants performing photosynthesis and using carbon
What is happening to the Amazon rainforest's role as a carbon sink?
It's becoming a carbon source
It's becoming more efficient
It's remaining stable
Thawing permafrost is releasing carbon that was stored in frozen soil. What type of forest is permafrost found in?
Boreal
Tropical
Temperate
Carbon dioxide (CO2) in the atmosphere is...
natural
caused by human activities
both of the above