Answers2001310 Earth Science Sem 1 - PearsonStar Systems and Galaxies

Star Systems and Galaxies Answers

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Which statement does Lola need to correct, and why?

A
Statement 1 because spiral galaxies do not have arms.
B
Statement 2 because the bulges contain mostly young red stars.
C
Statement 3 because the arms are made of mostly young blue and blue-white stars.
D
Statement 4 because spirals galaxies contain little to no dust.
2
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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.

Answer:

wobble

3

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.

Answer:

eclipsing

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