universe & solar system section 1 Practice Questions Answers Test with Solutions & More Shortcuts

Universe, solar system and Astronomy PRACTICE TEST [13 - EXERCISES]

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universe & solar system section 13

Question : 46

What causes the change of seasons ?

a) Earth’s revolution and inclination of its axis

b) Earth’s rotation and inclination of its axis

c) Earth’s revolution

d) Earth’s rotation and revolution

Discuss »

Answer: (a)

The revolution of the earth around the sun alone is not enough for a change of seasons. Had the axis of the earth been vertical, the sun would have been vertical at the same latitude throughout the year.

Therefore the revolution of the earth and its inclination, both are necessary for the change of seasons.

Question : 47

Which of the following planets is smaller in size than the Earth?

a) Saturn

b) Neptune

c) Uranus

d) Venus

Discuss »

Answer: (d)

Venus is smaller in size than the Earth. Diameter of earth is12,742 km while that of Venus is12,100 km

Question : 48 [UPPCS (Pre) 2002]

Which of the following planet takes the least time to orbit the Sun?

a) Earth

b) Saturn

c) Mercury

d) Mars

Discuss »

Answer: (c)

Question : 49 [SSC CGL 2014]

The planet which has the highest surface temperature is

a) Pluto

b) Venus

c) Earth

d) Jupiter

Discuss »

Answer: (b)

Venus has a maximum surface temperature of 462°C (862°F) making it the hottest planet in the solar system. The high temperature is because of its dense cloud layer.

Question : 50

Consider the following statements

  1. The Earth receives the Sun’s energy at the infrared end of the spectrum.
  2. The Earth re-radiates the Sun’s heat as ultraviolet energy.
Which of the statement(s) given above is/are correct?

a) Both 1 and 2

b) Neither 1 nor 2

c) 2 only

d) 1 only

Discuss »

Answer: (b)

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