Sandstone is a common type of
A) meteoritic rock
B) sedimentary rock
C) metamorphic rock
D) igneous rock
B
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Much of Europa's surface appears chaotic and clogged with huge iceberg-like blocks. This is consistent with
A) a thin icy crust that has been broken into pieces by tidal forces below which is a subsurface ocean of water B) the surface thawing due to heat emitted by Jupiter C) the breaking up of the surface due to plate tectonics D) a giant impact that has recently shattered the crust into pieces
Why does Earth have so little carbon dioxide in its atmosphere compared to Venus?
A) Earth once had a lot of carbon dioxide, but it was lost to space during the heavy bombardment early in our solar system's history. B) Chemical reactions turned Earth's carbon dioxide into nitrogen. C) Earth has just as much carbon dioxide as Venus, but most of it is locked up in carbonate rocks rather than being free in the atmosphere. D) Earth's volcanoes outgassed far less carbon dioxide than those on Venus.
For a compound composed of ions, the smallest combination of ions that gives the formula of the compound is called a
a. molecule. b. polyionic atom. c. polyatomic ion. d. formula unit.
How are speed and velocity related?
a. Speed and velocity are the same. b. Velocity relates to instantaneous speed, but not to average speed. c. Velocity specifies both the speed and the direction of a moving object. d. Velocity relates to very small objects, such as atoms, while speed relates large objects such as cars. e. Velocity is the scientific and technical word for speed.