When can an object be in a state of equilibrium?
A) when two or more forces are acting on it
B) when it is at rest and no forces are acting on it
C) only when one force is acting on the object
D) when an object is not moving
A
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Hydrothermal vents are only found in seawater
a. True b. False
What is the difference between density and concentration? Density is the ________ with which something occurs in ________, and ________ is the extent of a feature's spread over space
A) space, concentration, frequency B) frequency, space, concentration C) period, space, time D) period, concentration, space E) frequency, time, space
Which of the following is true of the six atoms of ethylene?
A) Four atoms lie in the same plane, but two atoms are not in this plane. B) All six atoms lie in the same plane. C) The carbon atoms have a tetrahedral geometry so the C-C-H angles are approximately 109°. D) none of the above
One of the following pairs of terms refer to sedimentary characteristics that you would not expect to find together in the same environment of deposition. The pair that does not make sense together is ___
a) high-energy beach, sand b) mountain stream, angular boulders c) quiet lagoon, mud d) deep submarine basin, mud cracks e) lake bottom, mud