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Earth and Space: Unit 2 Test

Terms in this set (11)

Where does the energy of a star come from? Include a diagram in your answer.
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What can astronomers learn by studying a star's visible light absorption spectrum?
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What are some properties used to classify stars?
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Describe the lifecycle of our Sun (remember it is a STAR.) How is this different from a more massive star?
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What property(ies) allow us to determine the length of a star's life?
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Describe how the Sun, impacts our planet. List in detail positive and negative effects.
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8. How is the H-R diagram related to the life cycle of a star? (All stars start as a main sequence star, what must happen for a star to move around on an HR diagram?)
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9. How are luminosity and star size related?
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9. Our sun is on the main sequence with a surface temperature of around 5500 degrees celsius. If our sun uses up all of its hydrogen, it is expected to expand and its surface temperature will cool. Where is a likely location our sun will move to on the HR diagram?
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10. A blue supergiant star is detected and is still actively fusing hydrogen in its core, is this star considered young or old? Why do you think so?
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11. When observing stars, what characteristic do scientists use to know a star's surface temperature?
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