What has happened to average global temperatures over the last 100 years?
A. Decreased about 0.5°C
B. Increased about 0.5°C
C. Remained essentially constant
Answer: B
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Which of the following is not associated with rising air motions?
a. overrunning b. convergence of air at the surface c. convergence of air aloft d. divergence of air aloft
What is the primary mechanism by which plants protect climate?
A) They take oxygen out of the air for respiration. B) They take carbon dioxide out of the air during photosynthesis. C) They emit water vapor into the air during transpiration. D) They lower the air temperature by absorbing heat.
Which of the following statements best illustrates bias in scientific investigations?
A) Investigations of the cause of AIDS are limited by our inability to see viruses. B) Investigations of the health effects of smoking are funded and published by a tobacco company. C) An experiment testing the effect of a new drug has only one control group. D) Researchers studying heron nests notice that some baby herons fall out of nests and are killed.
Granite and ________ are composed predominantly of feldspar and quartz.
A. ultramafics B. oceanic crust C. diorite D. basalt E. rhyolite