The Expanding Universe

Question 1

Use the drop-down menus to identify each type of galaxy pictured.

Revolt · Accepted Answer

elliptical galaxy; Galaxy A:: elliptical galaxy; Galaxy B:: irregular galaxy; Galaxy C:: spiral galaxy

Question 2

Galaxy B: [___]

Revolt · Accepted Answer

irregular galaxy

Question 3

Galaxy C: [___]

Revolt · Accepted Answer

spiral galaxy

Question 4

A binary star system is made of stars, one of which is brighter than the other. Astronomers are able to detect the dimmer star because its gravity causes the bright star to . Astronomers can also spot the dimmer star by observing a phenomenon called a(n) binary. This happens when the dim star passes in front of the bright star.

Revolt · Accepted Answer

two

Question 5

A binary star system is made of [___] stars, one of which is brighter than the other. Astronomers are able to detect the dimmer star because its gravity causes the bright star to [___]. Astronomers can also spot the dimmer star by observing a phenomenon called a(n) [___] binary. This happens when the dim star passes in front of the bright star.

Revolt · Accepted Answer

wobble

Question 6

A binary star system is made of [___] stars, one of which is brighter than the other. Astronomers are able to detect the dimmer star because its gravity causes the bright star to [___]. Astronomers can also spot the dimmer star by observing a phenomenon called a(n) [___] binary. This happens when the dim star passes in front of the bright star.

Revolt · Accepted Answer

eclipsing

Question 7

Which statement does Lola need to correct, and why?

Revolt · Accepted Answer

Statement 3 because the arms are made of mostly young blue and blue-white stars.

Question 8

Galaxy A: [___]

Revolt · Accepted Answer

elliptical galaxy

Question 9

Galaxy B: [___]

Revolt · Accepted Answer

irregular galaxy

Question 10

Galaxy C: [___]

Revolt · Accepted Answer

spiral galaxy

The Expanding Universe Answers

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