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Solar system

TermDefinition
Astronomical unit Used to measure far distances in space 1AU=distance from earth to sun
Meteoroid Chunk of 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 kulper belt and Oort Cloud
Inner planets - terrestrial planets - solid and rocky - Mercury, Venus, Earth, and Mars
Outer planets - gas giants - made of ice and gas - Jupiter, Saturn, Uranus, Neptune
Planet Spherical, orbits the Sun, clear its obit
Mercury - closest to the sun - NOT THE HOTTEST-so small it lacks gravity and atmosphere -
Venus Hottest planet - Green house effect -day is longer than a year - rotation time is longer than it’s revolution
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
Green house effect Occurs when when a planet’s atmosphere traps Solar energy
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 planet
Gas giants Jupiter, Saturn, Uranus, Neptune, Nickname for the 4 outer planets
Galilean moons 4 Galilean moons discovered around Jupiter -Io, Europa, Ganymede, Callisto
Dwarf planets - Pluto was the first - same as a planet but not larger than
Created by: user-1979302
 

 



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