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Solar system
| Term | Definition |
|---|---|
| Astronomical unit | Used to measure far distance in space 1AU=92,955,807.273 mi distance from earth to sun. |
| Meteorid | Chunks of rock smaller than an asteroid. |
| Asteroid | Millions of small rocky objects that orbit the Sun and in the asteroid belt between mars and Jupiter |
| Comet | Made of gas dust and ice revolve around the sun and muller belt and Oort Cloud |
| Inner planets | Terrestrial planet's solid rocky Mercury Venus earth mars |
| Outer planets | Gas giants Made of ice and gas Rings and moons Hydrogen and helium |
| Mercury | Closets planet to the sun. Not the hottest so small it lacks gravity and atmosphere |
| Venus | Hottest planet Gwen house affect Day is longer than a year rotation time is longer than it’s revaluation Acid clouds |
| Earth | Only planet with known life . Moderate temperatures Protective atmosphere Liquid water |
| Mars | Largest known mountain Olympus mons Possible signs of life |
| Terrestrial planets | He four inner planets |
| Glenn house affect | Occurs when a planets atmosphere traps solar energy and causes the temperature to increases. |
| Jupiter | Largest planet. Galilean moons. Great Red Spot. |