During summer near the North Pole, the Sun is above the horizon a shorter period of time than in the mid-latitudes
a. True
b. False
ANSWER: False
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Residence times are dependent upon steady-state conditions and a well-mixed ocean
a. True b. False
Figure 3.15 Generalized pyramid of energy flow showing the decrease in usable chemical energy available at each succeeding trophic level in a food chain or food web.
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Use the accompanying figure to answer the following five questions.
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Why is heat shown as being lost to the environment?
What will be an ideal response?
Geothermal energy is ________
A) energy originating from the sun and slowly released from Earth's core B) only able to be used during the day C) geographically limited D) intermittent E) based on nuclear reactions in the Earth's core
The trickling-filter system and the activated-sludge systems in wastewater treatment both require
a. the addition of large amounts of chlorine to kill pathogens. b. the addition of large amounts of ammonia as nutrients to support decomposers. c. high levels of oxygen to promote aerobic decomposition. d. high levels of carbon dioxide to adjust the pH of the water for bacterial action.