The presence of _____ on the Moon implies that the craters on the Moon were formed by impacts
A) ejecta
B) magma oceans
C) the Maxwell Montes
D) permafrost
A
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Planetary scientists believe that the Moon was most likely a nearby small planet gravitationally captured by Earth.
Answer the following statement true (T) or false (F)
Ordinary matter is made from what generation quarks?
A. 1st B. 2nd C. 3rd D. 1st and 2nd E. 1st, 2nd, and 3rd
Which of the following statements is true?
A) Both the Northern and Southern hemispheres receive the same amount of sunlight on the equinoxes. B) The Southern Hemisphere receives the most direct sunlight on the summer solstice. C) The Northern Hemisphere receives the most direct sunlight on the summer solstice. D) Both the Northern and Southern hemispheres receive the same amount of sunlight on the solstices. E) Both A and C are true.
An uncharged pith ball is suspended by a nylon fiber. When a negatively-charged rubber rod is brought near the pith ball, without touching, the ball
A) becomes charged by induction. B) becomes polarized. C) is repelled by the rod. D) is unaffected. E) none of the above