About how many minerals make up the majority of rocks on Earth's surface?
A) 10
B) 12
C) 40
D) 100
Answer: C
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If a country had a population of 1 million in the year 1980 and the population increased at a constant rate of natural increase of 7%, what would be the doubling time? (remember this is exponential growth)
A) about 3 years B) about 7 years C) about 10 years D) about 15 years E) about 20 years
Any large cave formed by chemical processes is a
A) cavern. B) doline. C) karst valley. D) collapse sinkhole.
A child in which of the following countries would have the biggest environmental footprint?
A) Namibia B) Australia C) Vietnam D) Bolivia E) Yemen
If you are driving in a car and a tornado is still at some distance, you should drive ____
a. into a ditch and cover your head b. under a freeway overpass c. at a right angle to the tornado’s path d. parallel to the tornado’s path e. toward the tornado