Download CIM Quiz E.7.1

Quiz: Biogeochemical Cycles
1. Which of the following is not true about matter in the biosphere?
A. Matter is recycled in the biosphere?
B. Biogeochemical cycles transform and reuse molecules?
C. Biogeochemical systems use up matter as they change it?
D. Water and nutrients pass between organisms and the environment?
2. Which would most decrease the amount of carbon dioxide in the air?
A. running dog
B. burning a forest
C. growing maple tree
D. Person driving a car
3. Which is not an essential element to life on Earth?
A. Boron
B. Carbon
C. Oxygen
D. Nitrogen
4. Bacteria are some of the smallest yet most important organisms on earth. As
decomposers, they play a significant role in cycling nutrients within Earth’s ecosystems.
Which is true of bacteria?
A. Bacteria only decompose dead organisms in the soil.
B. Bacteria do not decompose dead organisms in frozen areas.
C. Decomposers like bacteria turn once-living organisms into proteins for use in the
food chain.
D. Bacteria decompose organisms into nutrients which are used by other organisms in
the food chain.
5. Suppose humans modified the carbon cycle by burning more fossil fuels. Which
statement offers the best prediction of one possible result?
A. The animals would increase their rate of respiration.
B. The amount of carbon dioxide in the atmosphere would decrease.
C. The amount of carbon dioxide in the carbon cycle would increase.
D. The extra carbon dioxide would support more photosynthesis by plants.
6. The image above shows that the phosphorus cycle is similar to the oxygen and nitrogen
cycles. Which is an important difference between the phosphorous cycle and the other
biogeochemical cycles?
A.
B.
C.
D.
Phosphorus is not an essential nutrient for living things.
Organisms can create their own phosphorus.
Phosphorus never enters the atmosphere as a gas.
Plants absorb phosphate through their roots.