What are comets made of?
a. high-magnesium and -iron rocks
b. ice
c. ice and some rock
d. nickel-iron
e. close-packed hydrogen
ANSWER: c
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Fossil fuels currently supply about 50 percent of the world's commercial energy supplies.
Answer the following statement true (T) or false (F)
What theory proposes that the same processes seen today have operated throughout geologic time (i.e. the present is
the key to the past)? a. conformitarianism b. inclusion c. fossil succession d. uniformitarianism e. evolution
Match the term with the correct description.?
A. ?an indicator that includes unpaid volunteer work, health care provided by family members, child care, and housework B. ?subsidies that lead to environmental damage or harmful health effects C. ?can be levied on a per-unit basis on the amount of pollution and hazardous waste produced by a farm, business, or industry D. ?deceptive practice use to label environmentally harmful products and services as green E. ?an indicator that reflects the annual market value of all goods and services produced by all firms and organizations
Which one of the following is most likely to be associated both with impact craters and with volcanic calderas that originate by collapse?
A) outwardly radiating, fragmental, bright, surface streaks B) sharp, central peaks that rise above the floor of the depression C) sharp rims that rise well above the surrounding area far away from the edge of the depression D) landslides and other mass wasting movements along the walls of the depression