Page 102 - Genius Kidz Prudence Learning Sc-8

undergo complete burning, thus enter into around a planet artificially is called an
the earth's atmosphere as a half burnt rocky artificial satellite.
particle. Moon : Natural satellite of the earth is moon. It

! Meteorites help the scientists to study the is visible in the night sky because of the
composition of solar system. reflection of sunlight falling on it. Moon orbits

SATELLITES the earth with a speed of 3680 km/hour. Time
required by the moon to complete one
A celestial body that revolves around a planet
in specific orbital path is called a satellite.

Satellites can be of two types :
(a) Natural Satellite : A
celestial body that
revolves around a planet
naturally is called a

natural satellite or a
moon.
(b) Artificial satellite : A Moon
Moon rotate around the earth
man made object that is made to revolve

Activity 3
Find out : why moon and sun appear to be of same size to us though sun is about 400 times bigger than the moon.

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revolution of earth is about 27 days. Changes in position of the moon change its
However, the time taken by the moon to visible shape : phases of the moon.
complete one rotation about its own axis is Due to the change in the relative position of
called 1 lunar day and it is equal to 29 days. moon, sun and the earth, the amount of

1 lunar day = 29 days. reflected light from the moon changes which
in turn changes the visible shape of the moon.

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