The change in seasons on the earth occurs because
(a) the distance between the earth and the sun is not constant.
(b) the axis of rotation of the earth is parallel to the plane of its
orbit.
(c) the axis of rotation of the earth is perpendicular to the plane
of its orbit.
(d) the axis of rotation of the earth is tilted with respect to the
plane of its orbit.
Suppose a new planet is discovered between Uranus and Neptune.
Its time period would be
(a) less than that of Neptune.
(b) more than that of Neptune.
(c) equal to that of Neptune or Uranus.
(d) less than that of Uranus.
An astronaut standing on the surface of the moon throws a ball
upwards. The ball would
(a) directly fall down from the point it is released.
(b) hang in space.
(c) go up and then come back to the surface of the moon.
(d) keep going up never to come back.
Sun appears to move from east to west around the earth. This
means that earth rotates from
(a) east to west (c) north to south
(b) west to east (d) west to north
Morning star is the name given to
(a) pole star (c) planet Jupiter
(b) star Sirius (d) planet Venus
How is the phenomenon of reflection used in making a
kaleidoscope? What are the applications of a kaleidoscope?
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