Plankton are small animals and plants that float passively in the marine environment
a. True
b. False
True
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Which of the following planets does not have an atmosphere?
A. Mars B. Mercury C. Jupiter D. Venus
Earthquake P-waves are most like
A. water waves because they have crests and troughs. B. vibrations in a string because they vibrate perpendicularly to the direction of travel. C. sound waves because they are longitudinal. D. light waves because they are transverse.
The amount of CO2 in the atmosphere is higher now than any time in the last 800,000 years
Indicate whether the statement is true or false
Evidence for the existence of dark matter includes ________
A) the observation that the universe is not expanding as fast as predicted by Big Bang Theory B) the observation that stars near the center of galaxies do not rotate as fast as expected C) the observation that Mercury rotates about the Sun faster than Pluto D) the observation that the universe appears to be slowing down