If air were a better conductor than it is, nighttimes on Earth would be
A) considerably colder.
B) considerably warmer.
C) not appreciably different in temperature.
Answer: A
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In cold-forming of plastics, the green compact is ___________to produce the final product.
Fill in the blank(s) with the appropriate word(s).
If you are standing on the Moon and release a strong balloon filled with helium gas, the balloon will
1) rise. 2) fall. 3) neither rise nor fall. This occurs because 4) helium gas is lighter than air. 5) the Moon does not have an atmosphere. 6) gravity is weaker on the Moon.
Comets belong to the ________.
A. dwarf planets and Asteroid belt B. Asteroid belt and Kuiper belt C. Kuiper belt and Oort cloud D. Oort cloud and dwarf planets E. None of these choices is correct.
The cosmological principle states that any observer in any galaxy will see the same general features of the Universe
a. True b. False Indicate whether the statement is true or false