•Question 10 (1 point) Sunsets appear red
for the same reason that some
stars in space appear red -- they are both seen through dust particles. Why does this make them appear red?
a.The dust is heated
and emits red light.
•b.The
dust scatters blue light more than red light, such that more of the red light passes directly though
the dust.
•c.Dust polarizes light which always makes it redder.
• Question
11 (1 point) The Pleadies is an open star cluster not too far from us. It also represents a textbook example of
a type of nebula.
Which type is it?
a.An emission nebula
b.A dark nebula c.A reflection nebula d.A
stellar nebula e.None of the above
Question 12 (1 point) Stars
are born in regions which (before the new stars can modify them) are
a.dense
cold molecular clouds. b.hot
ionized hydrogen regions.
c.low density regions between clouds
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