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Solar system
| Term | Definition |
|---|---|
| Mercury | |
| Earth | .only planet with known life .moderate temperatures .protective atmosphere .liquid water |
| Mars | .largest known mountain-Olympus mons .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 |
| Venus | .Hottest planets .Greenhosue effect .Day longer than a year-rotation time is longer than its revolutions .acid clouds |
| Mercury | .closet planet to the sun .NOT HOTTEST -so small it lacks gravity and atmosphere |
| Jupiter | .largest planet .Galilean moon .great Red spot |
| Saturn | .Most complex ring system .least dense planet -it would float .Home of titan-a moon |
| Uranus | .Rotation axis is tilted 90 degrees so rotates like bowling ball |
| Neptune | .longest period of revolution .swirling storms-windiest planet |
| Gas giant | Jupiter,Saturn ,Uranus,Neptune Nickname for the 4 outer planets |
| Galilean moons | 4 moons Galileo discovered around Jupiter -io,Europa,Ganymede,callisto |
| Dwarf planet | .pluto was the first .same as planet but not larger than its neighbors .ceres in the asteroid belt |