chapter 16 the solar system
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Created by:
clubamericalara on July 29, 2008
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53 terms
Terms | Definitions |
|---|---|
 telescope was | invented in 1609 in holland |
| mercury | 1st |
| venus | 2nd |
| earth | 3rd |
| mars | 4th |
| jupiter | 5th |
| saturn | 6th |
| uranus | 7th |
| neptune | 8th |
| total mass of planets | .13 of the sun |
| all orbits lie in the | same plane |
| inner planets | mercury, venus, earth, mars |
| outer planets | jupiter, saturn, uranus, neptune |
| outer planets contain | over 130 satellites |
| inner planets | have low escape speed |
| outer planets | have high escape speeds |
| tycho brahe | worked with comets claiming that they were more distant than the moon |
| comets | leftover matter from the early part of the history of the solar system |
| comet contains | ice and dust called dirty snowball |
| comets are | held together by gravity and contain clay and carbonates |
| edmund halley | english astronomer who claimed a comet would return soon |
| comets tail | always points away from the sun because of solar wind |
| solar wind | the stream of ions that constantly flows outward from the sun |
| meteoroids | small fragments of matter that the earth meets as it travels through space |
| meteors | shooting star |
| micrometeorites | reach our planet daily |
| perseid showers | occur in mid august |
| meteroids | speeds range up to 72 km/s |
| stony meteorites | consist of silicate much like those in common rocks |
| iron meteorites | consists of iron and nickel |
| best place to seek meteorites | antarctica |
| most rocks | come from mountains |
| 16,000 | meteorites have been collected |
| stony meteorites called chondrites | most common |
| 100 | crater average have hit the earth |
| mercury appears | as a companion to the sun |
| mercury takes | 59 of our days to spin on its axis and 88 days to rotate the sun |
| mercury temperature | can reach 450C and drop to -200c |
| mercury has | alot of craters |
| mercury has | never melted |
| mercury contains | a crust of silicate rocks |
| mercury is | the densest planet |
| venus is the | brightest object in sky besides moon and sun |
| venus | spins backward on its axis |
| venus has | alot of volcanic activity |
| venus has no | magnetic field |
| bernard de fontanelle | believed that in venus there is life |
| venus atmosphere | is made up mostly of carbon dioxide |
| venus temperature | 470C |
| satellites of mars | phobos and deimos |
| surface gravity of mars | 38 % of earths |
| mars lacks | internal heat |
| mars revolution | takes 2 years |
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