Rotation and revolution

1.What causes day and night? a)revolution of Earth b)rotation of Earth c)orbit of Earth d)The moon blocks the Sun

2.What takes a year? a)Rotation b)revolution

3.How long does it take for the earth to rotate around the sun? a)365 days b)365.5 days c)365 1/4 days d)about 365 1/4 days

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