The Carbon Cycle
The Carbon Cycle
1. How do producers like trees, algae,
and grass obtain carbon?
A. They get it from the ground.
B. They make carbon from scratch.
C. They obtain it from atmospheric CO2.
D. They convert oxygen or nitrogen into carbon.
The Carbon Cycle
2. What process do producers use to fix
carbon into organic compounds, like sugar?
A. Cellular respiration.
B. Assimilation.
C. Carbonification.
D. Photosynthesis.
The Carbon Cycle
3. How do primary consumers like cows,
beavers, and grass carp obtain carbon?
A. They get it from consuming plants.
B. They make carbon from scratch.
C. They obtain it from atmospheric CO2.
D. They convert oxygen or nitrogen into carbon.
The Carbon Cycle
4. By what process do plants and animals return
carbon back into the atmosphere.
A. Assimilation.
B. Photosynthesis.
C. Cellular respiration.
D. Carbon fixation.
CO2
The Carbon Cycle
5. Three main types of fossil fuels are natural gas,
oil
coal
_________
, and _________.
Want to trade places?
The Carbon Cycle
6. By what process does plant and animal matter
become fossil fuels (coal and oil) over time?
A. Carbonification.
B. Photosynthesis.
C. Cellular respiration.
D. Carbon fixation.
The Carbon Cycle
7. The process by which organic substances are
broken down to the point where they become
part of the soil is called
A. Carbonification.
B. Consumption.
C. Combustion.
D. Decomposition.
The Carbon Cycle
8. The process by which fossil fuels are burned to
produce usable energy.
A. Carbonification.
B. Consumption.
C. Combustion.
D. Decomposition.
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Word List
Atmospheric CO2
Cellular Respiration
Carbonification
Combustion
Consumption
Decomposition
Photosynthesis
14
Oil
Coal
The Carbon
Cycle
The Carbon Cycle
16. Name a geologic process that can put an
enormous amount of CO2 into the atmosphere.
Volcanism
The Carbon Cycle
17. Because a forest absorbs more carbon than it
releases, a forest is referred to as a
A. Carbonate.
B. Carbon sink.
C. Saturator.
D. Compost pile.
The Carbon Cycle
18. When does a forest stop becoming a carbon sink?
When it has been cut down or is on fire.
The Carbon Cycle
Deforestation
19. ______________________
is the act or result of
cutting down or burning all the trees in an area.
The Carbon Cycle
2. Name the largest carbon sink on Earth.
Ocean waters.
They currently
absorb about
50% of our CO2
emissions.
The Carbon Cycle
21. Where does the carbon go that is absorbed
by the oceans?
Some of the carbon is used by shellfish,
corals, and some plankton to build their
shells or exoskeletons.
Oysters & clams
Plankton
Sea Urchins
The Carbon Cycle
22. As shell-bearing sea creatures die, their shells
fall to the ocean floor and become sediment.
Over millions of years of heat and pressure, this
sediment turns into
A. Limestone.
B. Sandstone.
C. Basalt.
D. Granite.
The Carbon Cycle
23. Since the beginning of the industrial revolution 250
years ago the acidity of the ocean surface waters has
increased 30%. What will happen if ocean waters
continue to absorb carbon dioxide?
Scientists predict by the end of the century ocean
water will be 150% more acidic than it is today, which
will dissolve sea shells as this experiment shows.
http://www.pmel.noaa.gov/co2/story/What+is+Ocean+Acidification%3F
The End