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Solar System

QuestionAnswer
Astronomical Unit Used to measure far distances in space 1 AU=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
Inner planets Terrestrial planets Solid rocky Mercury
Outer planets Gas Giants Made of ice and gas Jupiter, Saturn, Uranus, Neptune Rings and Moons Hydrogen and Helium
Planet Spherical, orbits the Sun, clears its orbit.
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 its 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 The four inner planets
Greenhouse effect Occurs when a planet’s atmosphere traps solar energy and causes the temperature to increase
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 it rotates like a bowling ball
Neptune Longest period of revolution Swirling storms-windiest planet
Gas giants Nickname for the 4 outer planets
Galilean moons 4 moons discovered around Jupiter-Io, Europa, Ganymede, Callisto
Dwarf planets Pluto was the first Same as planet but not larger than its neighbors Ceres in the asteroid belt
Created by: user-1979321
 

 



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