2 Which is TRUE about the Earth's motion?
I. It rotates on its axis
ll. It causes day and night
III. It revolves around the Sun
IV. It moves in a counterclockwise direction.
A. I
B. I and II
C. I, II and III
D. I, II, III and IV

3.Which explains why the half side of the earth is lighted while the other part is not?
A.the starlight
B.Earth's own light
C.the moonlight
D.half of the earth is facing the sun

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