Download Astronomy Unit Test – Chapter 21

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Use the diagram below to answer questions 1 & 2
Astronomy Unit Study Guide
1. Which point in the diagram below could produce a solar eclipse?
2. Which point in the diagram below shows the position of a lunar eclipse?
3. What is the cause of Earth’s Tides?
4. The diagram shows the orbit of the moon around Earth. Between which two points will the moon appear to
change from a new moon to a quarter moon?
5. Describe how Earth’s orbit around the sun determines the seasons of Earth?
6. Why is it warmer near the Equator than the poles?
7. Create a flow-map that shows the organization of the universe, from smallest to largest unit?
8. The H-R diagram is based upon which 2 criteria?
9. The tilt of Earth on its axis affects __________________.
10. The longest day of the year occurs on the _________________ _____________________.
11. During which season does sunlight strike the Northern hemisphere as shown below?
12. Research indicates that galaxies are moving away from Earth. What method allows astronomers to
determine this movement?
13. Astronomers theorize that the universe began in an enormous explosion called __________ ___________.
14. The color of a star is related to its temperature. Create a flow-map listing the colors that correctly identifies
the temperature of the stars in order from hottest to coldest?
15. The diagram below shows the relative positions of Earth and the sun at a particular time of year. Describe
the length of day and night in the Northern and Southern Hemispheres at this time of year?
16. Star A and star B have the same absolute brightness, but star A is about twice as far from Earth as star B.
Describe the apparent magnitude of the stars?
17. Describe the reason for having a leap year?
18. The picture shows sand used to make a model of a galaxy. In the model, each grain of sand best represents
_____________.
19. Why is a month on the moon the same length as a day on the moon?
20. About how old is the solar system?
Use the H-R diagram to answer 22 – 25.
21. Which supergiant is the brightest?
22. Which star is the coolest on the diagram?
23. What category of star is Sirius B?
24. Which giant is the brightest?
25. Predict what will happen when the sun runs out of fuel.
26. What is used to classify stars?
27. At which phase of the moon could a solar eclipse occur?
28. A star is twice as massive as the sun. How will its lifespan compare with the sun?
29. Some astronomers discover a galaxy that contains only old stars. What type of galaxy is it likely to be?
30. What does Hubble’s Law state?
31. Create a flow-map that properly sequences the formation of the solar system?
32. A group of stars that form patterns in the sky is called _______________________.
33. To express the distance between the Milky Way galaxy and other galaxies, the most appropriate unit of
measurement is the _______________ __________________.
34. Which of the following properly sequences the life cycle of a massive star?
35. The Milky Way galaxy would best be classified as ____________________ galaxy.
36. Convert into scientific notation: 8,000,000,000,000
37. Convert into standard form: 8.543 X 1012
38. The model below is set up to show how a lunar eclipse occurs. What is the greatest limitation of this model?
39. Which of the following star systems is an eclipsing binary?
1. What are the characteristics of UV waves?
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Use the diagram to answer questions 2 – 4.
2. In the diagram above, what is letter A
representing? ______________________
3. What is the letter M representing?
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4. What is the letter C representing?
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5. What are the characteristics of Gamma Rays?
C
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6. What are the characteristics of particles in a transverse wave?
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7. List EM waves in order of longest wavelength to shortest wavelength?
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8. Infrared light is often used in reptile habitats. What explains how a reptile benefits from infrared
light?
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9. What are the 7 types of electromagnetic waves?
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2. _________________________________________
3. _________________________________________
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7. _________________________________________
10. What are the characteristics of particles in a longitudinal wave?
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