Which of the following explains why clouds appear white when the sun is shining?

A. They contain white pigments.
B. They refract white light.
C. Light of all colours is scattered many times within the clouds.
D. They cannot absorb the specific frequency of white light.


Answer: C

Environmental & Atmospheric Sciences

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Assume that water filling a crack in a rock undergoes cycles of freezing and melting. Which of the following statement is true?

a. Water shrinks as it melts, causing the crack walls to be pulled closer together. b. Water expands as it melts, causing the crack walls to be pushed apart. c. Water shrinks as it freezes, causing the crack walls to be drawn closer together. d. Water expands as it freezes, causing the crack walls to be pushed apart.

Environmental & Atmospheric Sciences

According to Dissimilarity-Index scores, disparities in health care density are no longer evidence of core-periphery inequality

Indicate whether this statement is true or false.

Environmental & Atmospheric Sciences

Where on the map is the center of high pressure influencing ocean currents with a counterclockwise circulation?



A) A
B) B
C) C
D) D

Environmental & Atmospheric Sciences

In the polar front theory of a developing wave cyclone, energy for the storm is usually derived from an increase in surface winds, rising of warm air and sinking of cold air, and latent heat of condensation

a. True b. False

Environmental & Atmospheric Sciences