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(a)Circular orbit
(b)elliptical orbit
(c)triangular path
(d)Zig-zag path
16 Correct the statement. U 19 1
Distance between Earth and Sun remains constant.

17 This causes varying lenghs of day and night. K 19 1
(a)Inclination of the Earth's axis.
(b)Revolution
(c)Circle of illumination
d)Rotation
18 Correct the statement: U 18 1
Revolution causes day and night.

19 Earth‟s axis is always in ------------ position. K 18 1
a)at right angle b)slanting c)horizontal d)vertical
20 Why all the portions of Earth don‟t get light at the same time? U 18 1
21 What is the angle of inclination of Earth‟s axis with it‟s orbital K 21 1
plane?(Bk1a)
22 Define rotation and revolution?( Bk1b) K 21 1
23 What is the circle of illumination?Explain with diagram. A 18 3

24 Differentiate between rotation and revolution.(Any 3 U 18 3
points)What would happen if Earth doesn‟t rotate? +
2
REVOLUTION OF EARTH AND SEASONS
25 The movement of Earth around Sun is known as: K 19 1

a)Rotation
B)Inclination
c)Revolution
d)Illumination

26 Correct the Statement: K 19 1
Earth revolves around Sun in 365days and 4 hours.
27 Earth travels around Sun in_________ orbit. K 19 1

a)Circular