Sunsets are red because
A) the Sun itself is red.
B) red light is scattered less than blue light by the atmosphere.
C) red light reflects best off the bottoms of clouds.
D) dust particles are excited by incoming solar radiation, and when the Earth begins to cool after sunset they emit red light.
E) the atmosphere is thinnest nearest the Earth's surface.
B
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In the 110-V circuit shown,
A) 110 C of charge flow through the lamp every second. B) 110 J of energy are converted to heat and light in the circuit every second. C) 110 J of energy are given to each coulomb of charge making up the current in the circuit. D) 110 J of energy are shared among all the coulombs in the circuit at any instant. E) none of the above.
Rapid cooling of magma results in a(n) ____________________-grained texture called
____________________. Fill in the blank(s) with the appropriate word(s).
Which of the following features is evidence of ground-water dissolution?
A) sinkholes B) spits C) yardangs D) levees
The annual temperature range at most latitudes in the Southern Hemisphere is much smaller than that in the Northern Hemisphere. The reason for this is that ________.
Earth is closest to the Sun during the Southern Hemisphere summer rainfall and cloudiness are greater in the Southern Hemisphere a greater proportion of the land surface is mountainous in the Southern Hemisphere there is a greater percentage of water surface in the Southern Hemisphere