Page 248 - New Medley 5 Semester 2

the launch of missiles, the course of ships at sea and the

movement of military equipments on ground. For example,
CARTOSAT, GSAT-7A, RESAT, EOS-09, EMISAT, etc.

Navigation satellites: ese satellites enable operators

of aircraft, ships and land vehicles anywhere on

the earth to determine their locations with great accuracy.
For example, IRNSS, NVSO2, etc. Navigation satellite

Earth observing satellites: ese satellites locate mineral
deposits, determine the location and size of freshwater

supplies, identify sources of pollution and study their

e ect, and detect the spread of diseases in crops and
forests. For example, RESOURCESAT-I, IRS-1C, IRS-1D,

CartoSat, etc. Earth observing satellite
2 • Critical Thinking

Say Yes or No.

1. e moon comes between the earth and the sun during solar eclipse.

2. Tides are caused due to gravitational pull of the moon.

3. e low tide occurs on the Full moon day.
4. India launched its rst satellite in 1975.

AT ONE GO

 The moon is a natural satellite of the earth.
 The sun is a star located at the centre of the solar system.

 There are eight planets in our solar system.
 A solar eclipse occurs when the moon comes between the sun and the earth.

 A lunar eclipse occurs when the earth comes between the sun and the moon.
 Artificial satellites are man-made satellites that orbit the earth or other heavenly bodies.

REMEMBER THESE TERMS

Satellite : An object that revolves around a planet
Eclipse : A phenomenon when one celestial body casts its shadow on the other

Asteroids : A number of small bodies that revolve around the sun between the orbits of Mars
and Jupiter

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