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19 Cards in this Set

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Asteroid
any rock smaller in size than a planet and orbiting the sun
Astronimical Unit
average distance between the sun and earth 150 million km

used to determine the distance to objects located in the solar system
Comet
mass of dust, rock particles, and frozen gas that is actedon by solar winds and develops a tail when passing near the sun
Earth
3rd planet from the sun...only planet with known life and majority of it is covered with water...seems blue when viewed from space
Great Red Spot
huge swirling gas storm under high pressure in Jupiter's atmosphere
Inner Planets
Mercury, Venus, Earth, and Mars

The rocky solid planets nearest to the Sun
Jupiter
5th planet from the sun...largest planet...made of gas
Mars
4th planet from the sun...known as the red planet
Mercury
1st planet from the sun...2nd smallest... has craters and high cliffs
Meteor
Any meteroid entering the atmospher of Earth that burns up as it falls
meteorite
a meteroid that does not burn before striking the Earth's surface
Neptune
Ususally the 8th planet from the Sun...gaseous and have features that resemble storms
Oort Cloud
A group of comets surrounding the solar system beyond the orbit of Pluto...thought to be primary source of Comets in our Solar System
Outer Planets
Jupiter, Saturn, Uranus, Neptune, and Pluto...farthest planets from the Sun
Pluto
9th planet from the Sun...smallest planet in solar system...the only outer planet with a solid icy surface
Saturn
6th planet from the Sun...made of liquid and gas..has large rings
Solar System
system of 9 planets and other objects orbiting the Sun....may have been created from ice, gas, and dust over 5 billion years ago
Uranus
7th Planet from the Sun....orbits laying on its side...large and gaseous
Venus
2nd planet from the Sun...coverd by carbon dioxide and sulfuric acid atmosphere...hot