Ultramafic igneous rocks (those with very high magnesium and iron, and low silica content) may offer the best hope for improving the environment by
A. being placed on the ocean floor, where they can absorb water and reduce global sea levels.
B. absorbing CO2, with their rate of absorption capable of being increased by people.
C. reducing the rate of salinization of soils when it is ground into a fine powder and sprinkled on the surface.
D. pulling ground-level ozone out of the atmosphere as it cools.
Answer: B
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Soil composed of broadly similar proportions of sand, clay and silt is
A. leached. B. loam. C. pedocal. D. laterite.
Which early voyagers were known for their pillaging and looting?
a. Romans b. Vikings c. Polynesians d. Greeks e. Chinese
At the highest trophic level, there is less energy and fewer organisms than at the lower levels.
Answer the following statement true (T) or false (F)
In the winter you read in the newspaper that a large section of the Midwest is without power due to downed power lines. Which form of precipitation would most likely produce this situation?
a. snow b. hail c. freezing rain d. sleet e. rain