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21 Cards in this Set
- Front
- Back
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Pro posed of the sun and the planets and other bodies that travel around the sun |
Solar system |
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a cold dark cloud of gas and dust as well as possible site for future star formation |
nebulas |
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tiny building blocks of planets |
planetesimals |
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Earths spinning on its axis |
rotation |
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earth traveling around the sun |
orbit |
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motion around the sun along its orbit |
revolution |
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the time is takes for a single trip around the sun |
period of revolution |
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a closed curve in which the sum of the distances from the edge of the curve to two points |
ellipse |
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the name of the nebula the formed into our own solar system |
solor nebual |
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the average distance between the earth and the sun |
astronomical unit |
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the sun's outer atmosphere |
corona |
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a thin region below the corona |
chromosphere |
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where the gases get thick enough to see |
photosphere |
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a region about 200,000 km thick where gases circulate in convection currents |
convective zone |
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A very dense region about 300,000 km thick |
radiative zone |
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the center of the sun |
core |
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the process by which two or more nuclei with small masses join together to from a larger nucleus |
nuclear fusion |
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cooler, dark spots on the sun |
sunspots |
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the outer most layer of the earth |
crust |
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lies below the crust |
mantel |
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At the center of the earth |
Core |
