Which of the following are ways in which a geologist may determine the density of earth materials?
A. by measuring the different velocities of seismic waves
B. through direct measurement in the laboratory
C. using instruments to measure the pull of gravity
D. All of these choices are correct.
Answer: D
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Landslides due to the melting of permafrost ____
a. ?are shallow and only affect a few meters as the thawed layer slides off the remaining permafrost b. ?create rotational slumps as deeper thawed areas loosen the connection of permafrost to the supporting layers c. ?are extensive and damaging, where lakes and streams warm the ground d. ?create large translational slumps as unthawed permafrost slides over subsurface meltwater e. ?can be avoided if vegetation maintains a deep snow cover
The Global Positioning System (GPS) can specify location change as small as 2 mm.
a. true b. false
Xerophytic vegetation is most likely to be found in which of the following climatic regions?
a. tropical rainforest b. tropical savanna c. steppe d. desert e. tropical monsoon
Using the environmental lapse rate of 3.5°F/1000 feet, if you have a surface temperature of 77.5°F at sea level and go hiking in the nearby mountains to an elevation of 3000 feet, what will the temperature be at that elevation?
A) 67°F B) 60°F C) 88°F D) 0°F E) 73.5°F