Photosynthesis is a main means of fixing ________ in the ecosystem
A) benthos
B) oxygen
C) carbon dioxide
D) nekton
E) nitrogen
Answer: C
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Which of the following is not true of chlorofluorocarbons?
A. CFCs role in depleting ozone has yet to be confirmed. B. They are used to make foam products. C. They have been used as propellants in spray cans. D. CFCs are stable under conditions at Earth's surface. E. They are used in refrigeration systems.
The daily temperature range is greatest in a:
a. rainforest b. savanna c. monsoon d. desert
Which of the following has a negative radiative forcing (i.e. cools the planet)?
A) nitrous oxides (N2O) B) carbon dioxide (CO2) C) Trichlorodifluoromethane (CFC-11) D) methane (CH4 ) E) stratospheric ozone (O3)
Because of temperature differences, the most plentiful terrestrial wavelengths are 20 times ________ than solar wavelengths
A) more powerful B) longer C) faster D) slower E) shorter