Today, Antarctic ice shelves are ________

A) tiny
B) gone
C) disintegrating
D) bigger than in Pleistocene time
E) extending close to South America

Answer: C

Environmental & Atmospheric Sciences

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The half-life of radioactive parent isotope Q is 500 million years. Scientists testing a rock sample discover that the sample contains an equal number of daughter and parent isotopes. What is the age of the rock?

  1. 500 million
  2. 1000 million
  3. 1500 million
  4. 2000 million
     

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Environmental & Atmospheric Sciences

The clouds shown in Figure 4.15 are:a

cumulus.
b. stratus.
c. nimbostratus.
d. altostratus.
e. cirrostratus.

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Environmental & Atmospheric Sciences

Explain how icebergs are used as analogies for surface elevations

What will be an ideal response?

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Environmental & Atmospheric Sciences

What type of eruption is shown in this photograph?

A. pyroclastic column B. lava dome C. lava flow D. pyroclastic flow E. lava fountain

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Environmental & Atmospheric Sciences