Which of the following is characteristic of mountain stream valleys?
A) They are curvy and slow moving.
B) They are V-shaped and have rapids.
C) They have deltas.
D) They are deep and wide.
Answer: B
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Which reason best explains why both Venus's and Mars's atmospheres are primarily carbon dioxide, but Earth's is much less than 1% carbon dioxide?
A. Each planet has a significantly different surface temperature. B. Venus and Mars, being smaller than Earth, can't retain the same mixture of gases as Earth. C. Earth's rocks had much less carbon and oxygen in them. D. Plant life has existed on Earth for an extended amount of time.
Based on what we see in panoramic images, why do you think Moon is likely NOT to have an atmosphere?
A. Only in the absence of an atmosphere would the moon be able to reflect light from the Sun, thereby making it visible from Earth. B. If the Moon had an atmosphere, the light from the Sun would heat the atoms in the atmosphere and the atmosphere would start glowing. C. If the Moon had an atmosphere, then humans wouldn't have been able to land on its surface. D. If the Moon had an atmosphere, then Earth couldn't have an atmosphere since the two atmospheres would interact with each other. E. If the Moon had an atmosphere, it would scatter sunlight in all directions and the lunar sky would look bright.
The Drake Equation seeks to estimate the number of technological civilizations in the galaxy
Indicate whether the statement is true or false
A book is given a brief shove along a table top and released so that it slides a short distance and comes to rest. Galileo would say that the book stopped because
A) the ether slows it down to a stop. B) of friction. C) its natural motion is to come to rest. D) of its inertia. E) of gravity.