Besides Earth, which terrestrial planet also has seasons?
A. Mercury
B. Mars
C. Venus
D. Seasons are unique to Earth.
Answer: B
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What would happen to Earth's temperature if you painted the entire surface of the Earth black?
A) Its average temperature would go up. B) Its average temperature would go down. C) Its temperature would not change.
What happens to ISM atoms as they approach a star?
A: they are dispersed backwards B: they are captured by the star C: they are deflected around the star D: they crash into the star E: they pass right through the star
One liter of pure water at its maximum density has a mass of 1 ______________
Fill in the blank(s) with correct word
Exceedingly high temperatures are needed in a fusion reactor because _______
a. electrostatic barriers must be overcome b. the fuel must be ionized c. combustion needs heat to occur d. water must be boiled and pressurized.