Using specific examples, explain the role of insects in carbon cycling.

Suppose someone dumped leftover motor oil on a driveway. Could this disposal method contaminate the air, water, or soil? Explain your answer.

Solid waste includes all of the following except a. newspaper and soda bottles. b. food scraps and yard clippings. c. ozone and carbon dioxide. d. junk mail and milk cartons.

Describe the role of each of the following in nutrient cycling:

(a) Bacteria
(b) Fungi
(c) Plants
(d) Animals

Identify the process that releases nitrogen gas into the atmosphere.

Describe how bacteria could be used to degrade hazardous wastes. Write a short paragraph to explain your answer.

If your shirt is made of 50 percent cotton and 50 percent polyester, what part is biodegradable? a. cotton b. polyester c. both (a) and (b) d. none of the above

____ is any waste that is a risk to the health of humans or other living things.

In natural circumstances, accumulated reserves of carbon such as peat, coal and oil represent a sink or natural diversion from the cycle. Eventually the carbon in these sinks returns to the cycle through the action of geological processes which return deposits to the surface for oxidation.

(a) Describe the effects human activity on the amount of carbon stored in sinks.
(b) Describe two global effects of this activity
(c) Suggest what could be done to prevent or alleviate these effects.

Describe five instances in the nitrogen cycle where bacterial action is important. Include the name of each of the processes and the changes to the form of nitrogen involved:

Leachate is a substance that a. is produced in a compost pile. b. is a byproduct of bacterial digestion. c. is produced by incinerators. d. contains dissolved toxic chemicals.

Use each of the following terms in a separate sentence. source reduction

Contrast kinetic energy and potential energy. Give an example of each.

Describe the two processes that release carbon into the atmosphere.