Which of the following deserts are Subtropical Deserts?
a. The Sahara Desert
b. The Atacama Desert
c. The Kalahari Desert
d. Both a and c
e. Botha and b
Ans: d. Both a and c
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Assume that water filling a crack in a rock undergoes cycles of freezing and melting. Which of the following statement is true?
A) Water expands as it melts, causing the crack walls to be pushed apart. B) Water shrinks as it melts, causing the crack walls to be pulled closer together. C) Water expands as it freezes, causing the crack walls to be pushed apart. D) Water shrinks as it freezes, causing the crack walls to be drawn closer together.
Which of the following statements about streams is not true?
A) Base level is the lowest elevation to which a stream can erode. B) A steep stream high above base level generally will be eroding its channel. C) Some streams can simply transport material instead of eroding or depositing material. D) Streams typically do not respond to a change in climate.
Match the term with the correct description.?
A. ?using charcoal or resins to filter out harmful solids, distilling liquid wastes to separate out harmful chemicals, and precipitating such chemicals from solution B. ?converting hazardous chemicals to harmless or less harmful chemicals through chemical reactions C. ?using living organisms to detoxify hazardous waste D. ?the use of bacteria and enzymes to help destroy toxic or hazardous substances in soil or convert them to harmless compounds E. ?using natural or genetically engineered plants as "pollution sponges" that are able to absorb, filter, and remove contaminants from polluted soil and water
Which of the following is NOT an environment in which an igneous rock forms?
A. cooling and solidification of lava B. explosive eruption of volcanic ash C. intense squeezing from tectonic forces D. solidification of magma at depth E. All of these are environments that form igneous rock.