If estimates of an extinction rate 10,000 times greater than the background rate are correct, then what percentage of all species will be extinct by the end of this century?
A. 5-10%
B. 10-25%
C. 25-33%
D. 25-50%
E. 60-75%
Answer: D
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The diameter of a typical tornado funnel cloud would be:
A) 150 - 600 meters. B) 50 - 100 meters. C) 3000 meters. D) 1000 - 2500 meters.
What is the difference between an active continental margin and a passive continental margin?
A) A passive margin is the site of an ancient continental rift, left behind when seafloor spreading moved offshore, whereas an active margin is an active plate boundary. B) An active margin receives large amounts of sediment whereas a passive margin is sediment starved. C) An active margin has earthquakes whereas a passive margin has quiet erupting (aka passive) volcanos. D) A passive margin is passively carried along by plate tectonics in a transform system, like the San Andreas whereas an active margin is a trench.
Which device is used to assess the flammable range of a released vapor or gas?
a. Thermal imaging device b. Combustible gas indicator c. Colorimetric test strip d. Vapor ionization detector
What is a population cartogram?
What will be an ideal response?