Radon in homes comes, in part, from
A. leakage of exhaust gases from furnaces.
B. fumes given off by insulation materials.
C. natural rocks and soils and buildings made from these materials.
D. All of the choices are correct.
Answer: C
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Magma typically rises to Earth's surface at transform boundaries
a. True b. False
Sulfide minerals are potential environmental hazards because
A) they are weak minerals B) they are rich in calcium, which contributes to water degradation C) they can combine with oxygen and water to form sulfuric acid D) they are important sources of iron
Many of the world's poor only have access to a low-protein, high-carbohydrate, vegetarian diet and suffer from ____.
A. chronic undernutrition B. famine C. hunger D. chronic malnutrition E. food security
All of the following are true plants except ________.
A. halophytes B. seaweed C. sea grasses D. marsh grasses E. mangroves