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Topic 6 vocab
| Question | Answer |
|---|---|
| Astronomical unit | Used to. Measure far distance in space 1 AU = distance from earth to Sun. |
| Meteoroid | Chunk or rock smaller than asteroid |
| Meteor | Streak of light |
| Meteorite | Space rock found on Earth |
| Asteroids | Millions of small rocky objects that orbit the Sun in the asteroid belt between Mars and Jupiter. |
| Comets | Made of gas, dust, and ice, revolve around the sun in the Kuiper Belt and Oort Cloud.i |
| Inner planets | Terrestrial planets Solid and rocky Mercury, Venus, Earth, Mars |
| Outer Planets | Gas Giants Made of ice and gas Jupiter, Saturn, Uranus, Neptune Rings and Moons |
| Mercury | Closest planet to the sun Not the hottest so small it lacks gravity and atmosphere |
| Venus | Hottest planet Greenhouse effect Day is longer than a year rotation time is longer than it’s revolution 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 | Four inner planets |
| Green house effect | Occurs when a planets atmosphere traps solar energy and causes the temperature to increase. |
| Gas giants | Jupiter Saturn Uranus Neptune nickname for the four outer planets |
| Galilean moons | 4 moons Galileo discovered around Jupiter -Io Europa Ganymede, |
| Jupiter | Largest planet Galilean moons 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 | Longest period of revolution Swirling storms windiest planets |
| Gas giants | Jupiter, Saturn, Uranus, Neptune Nickname for the four 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 it’s neighbors Ceres in the asteroid belt |