Pyroclastic eruptions on a snow-capped volcano

A. can create dangerous lahars.
B. cause the volcanic ash to solidify.
C. stop when the melting snow cools the eruption.
D. are physically impossible.


Answer: A

Environmental & Atmospheric Sciences

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Two identical blocks of iron, one at 10°C and the other at 20°C, are put in contact. Suppose the cooler block cools to 5°C and the warmer block warms to 25°C. This would violate the

A) first law of thermodynamics. B) second law of thermodynamics. C) both A and B D) neither A nor B

Environmental & Atmospheric Sciences

Oceans heat and cool more slowly than land because of

A. lack of mixing through the water column. B. oceans' high specific heat dampen temperature changes. C. oceans' lack of transparency dampen temperature changes. D. great amounts of latent heat available to directly warm ocean water.

Environmental & Atmospheric Sciences

Which of the following countries has suffered in the twenty-first century from ethnic cleansing?

A) Kazakhstan B) Uzbekistan C) Tajikistan D) Kyrgyzstan E) Turkmenistan

Environmental & Atmospheric Sciences

Stars spend most of their life span as giants

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences