Which of the following statements about comets and asteroids is true?
A) All asteroids lie in the asteroid belt between Mars and Jupiter.
B) Only asteroids collide with Earth.
C) There are about 1 million known asteroids in the solar system.
D) Most of the trillions of comets in our solar system have tails.
E) Comets are balls of ice and dust.
Question 2
According to Newton's first law, if a body is moving in the absence of any net external force, describe the continuing motion of the object.
What will be an ideal response?
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
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