How is the Moon's crust similar to Earth's?
A. New lunar crust is forming at plate boundaries.
B. The lunar crust is thicker on one side than the other.
C. Volcanic activity produced most of the craters on the Moon.
D. The lunar crust is mostly silicate rock.
E. All of these choices are correct.
Answer: D
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_________ is a form of electromagnetic radiation produced by rapidly moving electrons spiraling through magnetic fields
a. Lagrangian radiation b. Accretion c. Ultraviolet radiation d. Synchrotron radiation e. Infrared radiation
When space probe Voyager 2 passed by Saturn, its speed increased (but not due to firing its engines). What must have happened?
A) Saturn must have lost a tiny bit of its orbital energy. B) Voyager 2 must have dipped through Saturn's atmosphere. C) Saturn's rotation must have sped up slightly. D) Saturn must have captured an asteroid at precisely the moment that Voyager 2 passed by.
Of all the planets, only ________ has surface features easily seen from Earth with even amateur telescopes
Fill in the blank(s) with correct word
An uncharged spherical conducting shell surrounds a charge ?q at the center of the shell. The charges on the inner and outer surfaces of the shell are respectively
a. ?q, ?q. b. ?q, +q. c. +q, ?q. d. +q, +q. e. +q, 0.