Which of the following geologic materials usually has the highest permeability?
A. vesicular volcanic rock
B. loosely cemented gravel and sand
C. shales and similar types of rocks
Answer: B
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The deterioration of surface rock can be attributed to weathering. What can be a result of weathering?
A) the formation of metamorphic rock B) tectonic action C) lithification to form sedimentary rock D) volcanic action
The wind-chill index takes into account the wind speed at about ____ above the ground instead of the where official readings are usually taken
a. ?10 m (33 ft) b. ?5 m (16.5 ft) c. ?100 m (330 ft) d. ?1.5 m (5 ft) e. ?15 m (50 ft)
The green flash is largely an example of the ____ of light by Earth's atmosphere
a. ?refraction b. ?reflection c. ?absorption d. ?diffraction e. ?transmission
Where does all energy used by life forms on Earth originate from?
A. plants B. animals C. flora D. photosynthesis E. the Sun