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1. Which of the following makes the planet Saturn unique in the Solar family?

(A) It is the biggest among the planets
(B) There is a well-developed system of rings around it
(C) It sends out very strong radio signals which sound like the noise of sea waves
(D) It shows phases like those of the Earth's Moon
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3. Which of the following statements in regard to the planets of the Solar System is not correct?

(A) All the planets are made of rock and metal
(B) All the planets move around the Sun from west to east
(C) All the planets revolve round the Sun in different elliptical orbits
(D) All the planets shine because they reflect the light of the Sun.
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4. The solar eclipse achieves totality only in limited geographical regions because?

(A) the size of the shadow of the moon on the earth is small compared to the cross section of the e
(B) the earth is not smooth flat surface; but has elevations and depressions
(C) the trajectories of the earth around the sun and the moon around the earth are not perfect cir
(D) sun rays can reach most of the peripheral regions of shadow of the moon due to atmospheric ref
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5. Things weigh less on the moon than on the earth because?

(A) the force of gravity on the moon is more than that on the earth
(B) there is no moisture on the moon
(C) there is no force of gravity 011 the moon
(D) the force of gravity on the moon is less than that on the earth
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6. The moon has no atmosphere because?

(A) no atmosphere ever formed there
(B) the rocky surface completely absorbed the gases
(C) due to the low temperature; gases have condensed
(D) its gravitational pull is not strong enough to hold an atmosphere
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7. Which one of the following is responsible for avalanches in snow-clad mountains?

(A) Its ownweight which has accumulated to such an extent that sliding takes place
(B) Melting of ice due to larger amount of solar energy absorbed at higher altitudes
(C) Melting of ice due to high velocitywind in the upper reaches of mountains
(D) None of the above
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8. Which of the following parts of the sunlight makes the solar cooker hot?

(A) Ultraviolet
(B) Red light rays
(C) Infrared
(D) Cosmic rays
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9. For a satellite to remain in orbit around the earth?

(A) the earth's gravitation must be less than rhecentripetal force needed. to keep it in circular o
(B) the gravitation of earth and moon must exert equal forces on the satellite
(C) the earth's gravitation must be equal to the centrifugal force needed to keep it in circular o
(D) the earth's gravitation must be equal to the centripetal force
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