The colors in this thermal infrared image indicate
A. the presence of ice in the crater.
B. the presence of methane in the crater.
C. temperatures of the rocks.
D. the presence of water in the crater.
Answer: C
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The number and variety of ecosystems in a particular area, each of which is a storehouse of genetic and species diversity, is called
A. ecological diversity. B. species diversity. C. functional diversity. D. biodiversity. E. genetic diversity.
The addition of large amounts of bioavailable nitrogen and phosphorus to our streams, lakes, and coastal areas, is responsible for which of the following?
A) reduction in water levels B) lake size increases C) lake and stream eutrophication D) lake and stream magnetization E) increase in breast and prostate cancer in humans
Why does sound travel rapidly though the lower well-mixed surface layer?
a. Temperature and pressure are homogeneous. b. Temperature and salinity are homogeneous. c. High refraction areas are produced. d. Density is heterogeneous. e. Shadow zones are produced
Plagioclase feldspar commonly exhibits ________, straight, parallel lines on the flat surfaces of one of the two cleavage directions.
A. laminations B. striations C. grooves D. parallelograms