universe & solar system section 13 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 36 [NDA 2012-I]

Lack of atmosphere around the Moon is due t

a) low gravitational attraction only

b) high escape velocity of air molecule only

c) high escape velocity of air molecule and low gravitational attraction

d) low escape velocity of air molecule and low gravitational attraction

Question : 37 [NDA 2014-I]

Plate tectonics is a scientific theory that describes the large scale motions of Earth’s lithosphere.
Which one among the following statements regarding Plate tectonics is not correct?

a) The Earth’s lithosphere is broken up into Tectonic Plates

b) Along divergent plate boundaries, subduction carries plates into the mantle

c) Tectonic plates are able to move because the Earth’s lithosphere has a higher strength than the underlying asthenosphere

d) Tectonic plates are composed of Oceanic lithosphere and thicker Continental lithosphere

Question : 38 [SSC CPO SI 2006]

The surface temperature of the sun is estimated as

a) 18000 °C

b) 24000 °C

c) 12000 °C

d) 6000 °C

Question : 39

‘Nife’ refers to

a) intermediate layer of the earth

b) none of the above

c) outermost layer of the earth

d) innermost layer of the earth

Question : 40 [SSC CAPFs SI, CISF ASI 2015]

The total number of planets revolving around the sun is

a) Seven

b) Six

c) Eight

d) Five