Carbon / Nitrogen Cycles Quiz
1. Carbon is essential to life because
A. It’s the most common element.
B. It is the molecule around which all the molecules of life are built.
C. It is found in inorganic molecules.
D. Plants can’t live without it.
2. Where do plants gets their supply of carbon?
A. Cellular Respiration
B. From the ground
C. From the waste of animals
D. Photosynthesis
3. Where does the carbon for your body come from?
A. Cellular Respiration
B. From breathing it in
C. From eating plants and animals
D. Photosynthesis
4. Where does the oxygen for your body come from?
A. Cellular Respiration
B. From the ground
C. From eating plants and animals
D. Photosynthesis in plants
5. Which of the following does not use up oxygen and produce carbon dioxide?
A. Cellular Respiration
B. Photosynthesis
C. Decomposition
D. Burning fossil fuels like coal and oil
6. Nitrogen is essential to life because
A. It is the most common element.
B. It is the molecule around which all the molecules of life are built.
C. It is breathed in by all life.
D. It is needed for building proteins (growth)
7. Plants get nitrogen from
A. Breathing it in
B. Absorbing it through roots from the ground
C. Basic photosynthesis
D. Cellular Respiration
8. Nitrogen-fixing bacteria are important because
A. They turn nitrogen from the air into nitrogen compounds in the soil.
B. They are essential for plants being able to carry out photosynthesis.
C. They break up dead plants and animals in the soil.
D. They release excess nitrogen from the soil into the atmosphere.
9. During decomposition,
A. Bacteria use oxygen to produce nitrates from ammonium.
B. Bacteria produce the oxygen needed for photosynthesis.
C. Bacteria put oxygen back into the atmosphere.
D. Bacteria use oxygen to produce ammonium from dead material.
10. Excess nitrates in water cause problems for the Chesapeake Bay because
A. They cause excessive cellular respiration in plants and animals, resulting in a large
amount of carbon dioxide production.
B. They cause excessive bacteria growth resulting in too much oxygen which hurts
photosynthesis in plants.
C. They cause excessive algae growth, blocking sunlight and reducing oxygen when it
dies.
D. Nitrates are poisonous to fish, crabs, and oysters.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
B
D
C
D
B
D
B
A
A
C