The Devonian period is also known as the “Age of Fish.”
a. True
b. False
True
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Name two ways that tsunami waves are different from regular waves
What will be an ideal response?
Which one of the following statements is INCORRECT?
A) The higher the GDP of a country, the more equal its income distribution.
B) The primary sector accounts for a larger share of GDP for LDCs than MDCs.
C) Workers in MDCs are more productive than those in LDCs.
D) The HDI is a function of economics, social, and demographic indicators.
E) PPP accounts for differences in cost among countries for the same basket of goods.
Mining rare earth elements, 90% of which are extracted and processed in China,
A) results in the release of sediment and sand into streams, compromising aquatic habitats. B) produces acidity, radioactive elements and other hazardous wastes stored in holding ponds. C) has a relatively low impact on the environment and human health. D) is now regulated by international treaties that prevent toxic materials from entering water and air.
The largest contributing factor for the current high rate of animal extinctions is
A. Drought conditions caused by the greenhouse effect B. Commercial harvesting of wildlife in Africa C. Uncontrolled sport hunting in the developed world D. Habitat destruction worldwide E. None of these by themselves cause high rates of animal extinctions, but together they combine to cause high rates