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| e band of color produced when white light passes through a prism |
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| huge, hot, bright balls of gas that are trillions of kilometers away from Earth. |
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| How can a scientist tell what elements are in the sun? |
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| different elements absorb different wavelengths of ligh, astronomers can tell what element a star is made from the light they observe from the star. |
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| a spectrum that shows all the colors of the spectrum |
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| astronomers use an instrument to break a stars light into a spectrum. |
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| are lines that are made when certain wavelengths of light, or colors, are given off by hot gases. |
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| around 15 million years old. |
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| Describe the big bang and give a brief description of it |
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| It is what scientists believe that started the war. It started as a singularity but over time is grew bigger and bigger. Some people think it was an explosion but it wasnt, it was just a really rapid expansion. |
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| How is the size of the universe changing? What observation or evidence leads to this conclusion? |
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| The universe is expanding and they can tell from red shift which shows the galaxies are moving away. Some scientists think that the universe will eventually become a dark, cold place. |
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| List three observations that support the Big Bang Theory. |
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| Abundant light elements, red shift, and cosmic background radiation. |
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| A spectrum that shows all colors |
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| scientists today classify stars according to |
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| the hottest of all stars are |
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| the actual brightness of a star is its |
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| the apparent shift in the position of an object resulting from a change in the direction or position from which the object is being viewed is known as |
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| Small, very hot stars near the end of their lives, which are actually the leftover centers of old stars are called |
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| the death of a large star by explosion |
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| galaxies with a bulge at the center and very distinctive arms are called |
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| giant cluds of gas and dust in space |
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| starlike sources of light that are exteremely far away, which some scientists think are galaxies in the process of forming, are called |
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| the study of the stars light |
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| what is and emission spectrum? |
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| a spectrum in which the colors are separated |
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| what is a continuous spectrum? |
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| the spectrum that shows all of the colors of the spctrum. |
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| what si the sbsorbtion spectrum? |
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| is the spectrum of a star. a spectrum is what appears when white light hits a glass prism. |
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| What causes the dark lines superimposed on the spectrum from a star? |
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Definition
| the stars absorb certain wavelengths of radiation from the light. After they absorb the light, it shows the dark lines. The dark lines are like fingerprints ofa star, they tell you what the star is made out of. |
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