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17. Why do we have day and night?
A. Because the earth revolves around the sun.
C. Because the earth tilts on its axis.
B. Because the earth rotates on its axis.
D. Options A and C
18. As the globe rotates, only half of it receives light so this side is bright. Places on this area experiences what time of
the day?
B. night time
C. dawn
D. midnight
A. daytime
19. When the other side of the earth is away from the sun, this side does not receive light so it is dark. What time on
this side of the Earth? A. daytime
C. dawn
D. midnight
B. night time
20. As seen from the North Pole in what direction does the Earth rotates.
A. clockwise
C. sideward
B. counter clockwise
D. backward











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