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Solar system
| Term | Definition |
|---|---|
| Mercury | Closet planet to the sun NOT THE HOTTEST-so small it lacks Gravity and atmosphere |
| Venus | Hottest planet Greenhouse effect Day is longer then a year-rotation time is longer then it’s Revolution Acid clouds |
| Earth | Only planet with known life Moderate temperature Protective atmosphere Liquid water |
| Mars | Largest known mountain-Olympus moons Possible signs of life |
| Terrestrial planets | The four inner planets |
| Greenhouse effect | Occurs when a planets atmosphere traps solar energy and causes the temperature to increase |
| Jupiter | Largest planet Galilean moon Great red spot |
| Saturn | Most complex ring system Least dense planet-it would float Titan-largest moon |
| Uranus | Rotation axis is tilted 90 degrees So rotates like a bowling ball |
| Neptune | Largest period if revolution Swirling storms-windiest planets |
| Gas giants | Jupiter,Saturn,Uranus,Neptune Nickname for the 4 outer planets |
| Galilean moons | Io, Europa, Ganymede,Callisto |
| Dwarf planet | Pluto was the first Same as planet but not larger then its neighbors Ceres in the asteroid belt |