According to the World Resources Institute, what percentage of the water that people use throughout the world is unnecessarily wasted?
a. one-tenth
b. one-third
c. one-fourth
d. one-half
e. two-thirds
E
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If there were no natural greenhouse effect, Earth's average global temperature would be about
A) 18°C. B) -18°C. C) 100°C. D) 0°C.
The lava at Kilauea volcano in Hawaii erupts at a temperature of approximately 1000 degrees Celsius. How could geologists overcome this problem when studying the lava flow?
A) Pour water on the lava. B) Don't bother studying the lava flow. C) Take pictures from far away and study them in the lab. D) Wear heat-resistant clothing and use tools that reach the flow from a few meters away.
What is the type of rock formed when magma or lava cools?
A) geothermal B) igneous C) metamorphic D) sedimentary E) lithospheric
If Earth warmed up, and more snow fell because of more water vapor in the atmosphere, and that snow then reduced Earth's temperature, which increased snow cover, then the initial increase in snow fall would be ________ feedback, while the continued
increase in snow fall would be ________ feedback. A) negative; positive B) positive; negative C) negative; negative D) positive; positive E) both negative and positive; both negative and positive