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41.

The solar wind is composed of:

A.	Outward stream of protons on the sun surface	B.	Ionized gas
C.	Plasma	D.	All of these

42.

Solar eclipse occurs when:

A.	Earth comes between sun and moon	B.	Moon is at right angle to earth
C.	Moon comes between sun and earth	D.	Sun comes between moon and earth

43.

The largest planet of the solar system is:

A.	earth	B.	Mars
C.	Jupiter	D.	Saturn

44.

Tides are caused by the gravitational pull of the:

A.	Earth on the moon	B.	Earth on the sun
C.	Sun and the moon on earth	D.	Moon on earth

45.

Which one of the following is not a satellite of Jupiter?

A.	Callisto	B.	Lo
C.	Eurpa	D.	Titan

46.

Moon is called a satellite of the earth because

A.	It is much smaller than the earth	B.	It revolves around the sun
C.	It has no light of his own	D.	It produces tides on earth

47.

Comets revolved around:

A.	Earth	B.	Sun
C.	Venus	D.	No single heavenly body

48.

The position of a planet when it is nearest to the sun, is called:

A.	Perihelion	B.	Aphelion
C.	Apogee	D.	Perigee

49.

Which of the following is known as the "Red Planet"?

A.	Mercury	B.	Mars
C.	Saturn	D.	Venus

50.

Which planet is known as the Earth's Twin?

A.	Venus	B.	Mars
C.	Uranus	D.	Neptune