8) What is a light year? A The distance light travels per year B) The distance l

Question

8) What is a light year? A The distance light travels per year B) The distance light travels in 2 years. C) The distance light travels in six months per year. D) The distance light travels in 10 year 9) Is the speed of light finite? A Yes B) No sIcl 10) Stars form in giant molecular clouds found in A) Jupiter's ocean B) the arms of Eliptical galaxies C) the arms of Spiral Galaxies. D) the arms Jupiter's oceans. - Ich 11) What are Proplyds? A) The disks were planets form B The disks were Galaxies form. C) The disks were neutron stars form. D) The disk around a black hole. 41cl 12) Does the Sun contain almost all of the mass of the Solar System? A) No Yes 13) Do smaller bodies cool more quickly than larger bodies? A) Yes B) No 14) What will gravity do to a hot molten body that is larger than 124 miles in diameter? A) make them irregular. B) make them spherical. C) make the oblong. D) make them elliptical. 15) What is a gas giant planet is made of? A) Hydrogen. B) Solid unobtainium. C) Helium. D) Nitrogen gas. 16) The process of modifying a planet by Volcanic activity is called A) Weathering.

Explanation / Answer

8)

A- The distance light travels in a year time period

1 light year = speed of the light x time taken to travel

= 3 x 108 m/s x ( 365 x 24 x 60 x 60 ) sec

1 light year = 9.46 x 1015 m

9)

Yes = The speed of light is finite which is about 3 x 108 m/s

10)

C - The arms of the spiral galaxies =  An average spiral galaxy, like our own Milky Way, contains about 1,000 to 2,000 Giant Molecular Clouds in addition to numerous smaller clouds.

11)

C - The discs where neutron stars are formed = A protoplanetary disk is a rotating circumstellar disk of dense gas and dust surrounding a young newly formed star, Externally illuminated photo-evaporating protoplanetary disks are called proplyds.

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