1. Chapter 28: Galaxies & Stars Review

2. C. Composed of billions of stars held together by gravity
1. What is a galaxy? A. made of planets held together by gravity B. background cosmic radiation C. composed of billions of stars held together by gravity D. contains a few stars
C. Composed of billions of stars held together by gravity

3. Electromagnetic Spectrum
This is an example of?
Electromagnetic Spectrum

4. 3. This method is used to determine if a star or galaxy is moving towards us or away from us. A. Parallax B. Doppler effect C. Big Bang Theory D. Astronomical Unit
B. Doppler Effect

5. 4. 98% of the visible matter of the universe comes from _________. A
4. 98% of the visible matter of the universe comes from _________. A. Black Holes B. Nebulas C. Suns D. Galaxies
D. Galaxies

6. 5. Who invented the telescope. A. Copernicus B. Galileo C. Kepler D
5. Who invented the telescope? A. Copernicus B. Galileo C. Kepler D. Hubble
B. Galileo

7. 6. Absolute magnitude is: A. Actual brightness of a star B
6. Absolute magnitude is: A. Actual brightness of a star B. Brightness that we see from Earth C. Highest temperature of a star D. Sound of a star
A. Actual brightness of a star

8. 7. The apparent shift of a star when viewed from two different locations on Earth is called: A. Doppler Effect B. Gravitational pull C. Parallax D. Apparent Magnitude
C. Parallax

9. 8. True or False: The closer the object is to the observer, the greater its parallax

10. 9. What is a light year?
Distance light travels in one year

11. 10. Which is not a main characteristic for stars: A. Temperature B
10. Which is not a main characteristic for stars: A. Temperature B. Mass C. Composition D. Color
C. Composition

12. 11. What type of star is our sun. A. Main Sequence B. Red Giant C
11. What type of star is our sun? A. Main Sequence B. Red Giant C. White Dwarf D. Yellow Super Giant
A. Main Sequence

13. 12. What determines a star’s color?
Temperature

14. 13. What color are the hottest stars?
Blue

15. 14. The H-R diagram shows the relationship between: A
14. The H-R diagram shows the relationship between: A. Apparent Magnitude and Size B. Apparent Magnitude and Temperature C. Absolute Magnitude and Size D.Absolute Magnitude and Temperature
D. Absolute Magnitude and Temperature

16. 15. According to the H-R Diagram, which group are main sequence stars?B. A. C.
A. Main sequence stars

17. 16. According to the H-R Diagram, which stars are bright and have cooler temps?
B. Red Super Giants

18. 17. About 90% of all stars are what type?
90% of stars are main sequence stars

19. D. Star is farther away than our sun
18. How is it possible for a star to have a larger absolute magnitude than our sun, but have a lower apparent magnitude? A. Star is at the end of its life cycle B. Star is a white dwarf C. Star is bigger than our sun D. Star is farther away from our sun
D. Star is farther away than our sun

20. 19. How do stars generate energy. A. Nuclear Fission B
19. How do stars generate energy? A. Nuclear Fission B. Nuclear Fusion C. Nuclear dynamics D. lots of exercise
B. Nuclear Fusion
- Stars fuse hydrogen atoms to form helium atoms resulting in energy

21. 20. What is the final life cycle stage of a massive star. A
20. What is the final life cycle stage of a massive star? A. Black hole B. Neutron Star C. White Dwarf D. Both A & B
D. Both A & B

22. 21. Stars originate from dust and gas called a ______________. A
21. Stars originate from dust and gas called a ______________. A. Nebula B. Protostar C. Pulsar D. Galaxy
Nebula

23. 22. Fill in the missing life cycle step of the following medium mass star: nebula protostar main sequence _____ planetary White Dwarf nebula
Red Giant

24. 23. What is the name of our galaxy?
Milky Way Galaxy

25. 24. Galaxies are characterized by what three shapes?
Spiral, elliptical, irregular

26. 25. True or False. The Milky Way galaxy is an elliptical galaxy.
False, the Milky Way is a Spiral Galaxy

27. 26. How does a black hole get its name?
It has a black color
It’s a hole in the universe
Its immense gravitational pull prevents light from escaping
A place where fanatical Raiders fans meet
C. Immense gravitational pull prevents light from escaping

28. 27. The theory for the formation of the universe A
27. The theory for the formation of the universe A. Universe Expansion Theory B. Doppler effect C. Big Bang Theory D. Theory of Relativity
C. Big Bang Theory

29. 29. What does a star’s spectra (shown below) tell you?
Spectra gives info on a star’s composition

30. 30. What evidence supports the Big Bang Theory?
Cosmic Background Radiation
Hubble’s doppler effect observation of galaxies moving away from us (red shift)
Discovery of a low hum generated from ancient sound waves from the big bang
All of the above
D. All of the above