During which phase of the moon do you expect to observe a lunar eclipse?
A. full moon
B. new moon
C. third quarter
D. first quarter
E. Lunar eclipses can occur at any phase of the moon.
Answer: A
Physics & Space Science
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A compass registers ______________
Fill in the blank(s) with correct word
Physics & Space Science
Why is the greenhouse effect weaker on Mars than on Earth or Venus?
A. High water vapor clouds reduce the amount of sunlight that reaches the planet's surface. B. There is no carbon dioxide in Mars's atmosphere. C. Mars's atmosphere is much thinner than those of Venus and Earth. D. Fog and frost on the Martian surface reflect much of the Sun's energy.
Physics & Space Science
The ratio of the universe's actual density to the critical density is:
A) ?critical. B) ?/?. C) ?o. D) H/D. E) 1/H.
Physics & Space Science
Which body has the densest atmosphere?
A) our Moon B) Mercury C) Earth D) Venus E) Mars
Physics & Space Science