Which planet experiences the greatest change between its actual day temperature and actual night temperature?
A) Mercury
B) Venus
C) Earth
D) Mars
A
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Notice that Earth's axis is shown with an arrowhead in this diagram. What does the arrow point to?
A) the Sun B) the ecliptic plane C) the center of the Milky Way Galaxy D) Polaris, the North Star E) the Northern lights
Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. Each bright fringe will shift to the location of the adjacent bright fringe if a thin film is placed in front of one of the slits. The minimum width of this film must be
A.
.B.
.C.
.D.
.E.
.Currently, our best hope of finding life on extrasolar worlds is
A) by interstellar travel B) by searching with telescopes C) by listening to extraterrestrial radio broadcasts D) contact with alien visitors to the Earth
S seismic waves can travel only through ______________ material
Fill in the blank(s) with correct word