Astronomy Unit Review

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Astronomy Unit Review

1. Read the question
2. Write your answer on the white board
3. Write ONLY the answer

2
Question 1

• What happens to the color of light as a star
  moves toward you?

3
Answer

• It turns blue.
• This is due to the Doppler Effect as objects
  move toward you,the wavelength shortens and
  appears more blue.

4
Question 2

• What happens to the color of light as a start
  moves away from you?

5
Answer

• It turns red.
• This is again due to the Doppler Effect as
  objects move away from you,the wavelength
  lengthens and appears more red.

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Question 3

• What happens to the wavelength of light as a star
  moves toward you?

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Answer

• The wavelength gets shorter.
• (and appears blue)

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Question 4

• What happens to the wavelength of light as a star
  moves away from you?

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Answer

• It gets longer.
• (and appears red)

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Question 5

• What theory says that wavelengths change as
  objects come toward or away from you?

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Answer

• The Doppler Effect

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Question 6

• What is the theory that says the universe started
  as one mass and then exploded?

13
Answer

• The Big Bang Theory

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Question 13

• What is a body of gases that gives off a
  tremendous amount of radiant energy in the form
  of light and energy?

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Answer

• A Star

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Question 14

• Which telescope made it a lot easier to study
  stars from Earth?

17
Answer

• The Hubble telescope

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Question 15

• The spectrum of light emitted from stars tells
  the ..

19
Answer

• Elements present on that star

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Question 16

• We measure distances in space in (what unit?)

21
Answer

• Light years

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Question 17

• The longest stage in a stars life is ..

23
Answer

• Main sequence

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Question 18

• What is the name of a cloud of gas and dust?

25
Answer

• A nebula

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Question 19

• What is the process that stars use to generate
  energy?

27
Answer

• Nuclear fusion

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Question 20

• Which element do hydrogen atoms turn into during
  fusion?

29
Answer

• Helium

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Question 21

• What is the name for the large, cool star?

31
Answer

• Red giant

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Question 22

• What is the name for a small, hot star?

33
Answer

• White dwarf

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Question 23

• What is the name for an explosion in space?

35
Answer

• Nova

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Question 24

• When stars contract with a great force and
  collapse in on themselves, what is created?

37
Answer

• Black Hole

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Question 25

• What are small star patterns called?

39
Answer

• Constellations

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Question 26

• What is a large group of stars called?

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Answer

• A galaxy

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Question 27

• What is the name of our galaxy?

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Answer

• The Milky Way

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Question 28

• What is the shape of our galaxy?

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Answer

• Spiral

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Question 29

• What are the two main elements in the sun?

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Answer

• Hydrogen and Helium
• (remember the sun is just a star)

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Question 30

• What is the outermost layer of the sun?

49
Answer

• Corona

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Question 31

• What is the layer of the sun that we see?

51
Answer

• Photosphere

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Question 31

• What are the cool places on the sun?

53
Answer

• Sunspots

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Question 32

• What are arches of glowing gas that arch above
  the sun?

55
Answer

• Solar prominences

56
Question 33

• What are the most violent solar prominences
  called?

57
Answer

• Solar flares

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Question 34

• What are the auroras called?

59
Answer

• Northern lights or Southern lights

60

• This concludes todays review activity.
• Have fun studying!!