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Chapter 15 Study Guide
Section 1 Telescopes P. 590-596
1. What is all energy produced from stars called?
2. What are the different forms of radiation produced by stars?
3. What is wavelength?
4. What is a refracting telescope?
5. What is a reflecting telescope?
6. What device measures radio waves from objects in space?
7. What is an observatory?
Section 2 Characteristics of Stars P. 598-605
1. What are constellations?
2. How are stars classified?
3. What is a spectrograph?
4. What is apparent brightness?
5. What is absolute brightness?
6. What characteristics determine the brightness of a star?
7. What is a light-year?
8. Why do astronomers use light years instead of kilometers in space?
9. What is the Hertzsprung-Russell diagram?
10. What is the main sequence?
11. Where are the brightest stars located?
12. Where are the dimmest stars located?
Section 3 Lives of Stars P. 608-613
1. What is a nebula?
2. What is a protostar?
3. What determines how long a star lives?
4. What does a star become when it runs out of fuel?
5. What are neutron stars?
6. What is a pulsar?
7. What is a black hole?
Section 4 Star Systems and Galaxies P. 614-621
1. What is a star system?
2. What are binary stars?
3. What is an eclipsing binary star?
4. What is the difference between open star clusters and globular clusters?
5. What is a galaxy?
6. What is a quasar?
7. What are some characteristics of a spiral galaxy?
8. What are some characteristics of an elliptical galaxy?
9. What are some characteristics of an irregular galaxy?
10. What type of galaxy is the Milky Way?
Section 5 The Expanding Universe P. 622-627
1. What is the big bang theory?
2. What is Hubble’s law?
3. How did our solar system form?
Period:
Essays – Pick two essays to answer on the test
1. Explain how an astronomer uses a spectrograph to study the stars.
2. Define absolute brightness and apparent brightness. Why do some stars with an absolute brightness that is
much greater than the sun’s have much less apparent brightness?
3. How do astronomers think our solar system formed?
4. Compare and contrast the three main kinds of galaxies.