On our Moon, Mercury, Earth, and Mars, there are a variety of meteor craters in terms of size. Yet all those found on Venus are over 5 kilometers across. Explain
What will be an ideal response?
The atmosphere of Venus is much thicker, so that only the largest asteroids (probably at least a kilometer across) can survive the fiery transit of this dense atmosphere and arrive intact at the surface to create such damage. Only the strong survive.
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To be dimensionally consistent, velocity [L/T], pressure 
and density 
must be related as follows.
A. velocity = pressure/density
B. 
C. 
D. 
A gallon container is filled with gasoline. How many gallons are lost if the temperature increases by 25°F? (The volume expansion of gasoline is 9.6 × 10^?4 (°C)?1.) (Neglect the change in volume of the container.)
a. 2.4 × 10^?2 b. 1.3 × 10^?2 c. 3.6 × 10^?2 d. 4.8 × 10^?2 e. 9.6 × 10^?2
How many times smaller are the tiniest particles that we know about than the size of the Earth?
A. about 1025 times smaller B. about 10 times smaller C. about 1000 times smaller D. about 100 million times smaller E. about 1 million times smaller
What do "forbidden" lines reveal about interstellar space?
A) The density or pressure of this gas is much lower than can be produced in a laboratory. B) The laws of physics are not the same in space as they are on Earth. C) There are unknown elements in space that do not correspond to elements found on Earth. D) There are molecules found in meteorites and interstellar dust that are not found on Earth. E) All of the above are true.