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Our Solar System Mary Meguerditchian Science 3rd Grade Our Solar System Consists Of… Sun Inner or Terrestrial Planets The Asteroid Belt Outer Planets or Gas Giants Comets Moons Sun Center and Star of our Solar System Planets travel around it in circular paths or orbits Holds the solar system together Filled with scorching, hot gases Provides energy that heats our world and makes life possible Inner or Terrestrial Planets Includes four, small planets: Mercury Venus Earth Mars Composed of rock and metal Mercury Innermost and smallest planet Closest planet to the sun It is gray, hot and very dry Surface is covered with craters Has a metallic or iron core Has no water, no air, and no moons Venus Second planet from the Sun Earth’s closest and most similar neighbor Brightest object in the sky, after the Sun and Moon Surface is covered with thick, poisonous clouds Has no oxygen in its air and no water on its surface Earth Third planet from the Sun Only planet where life exists Home to humans Largest of the inner planets Only planet that has liquid water at its surface Its atmosphere helps protect life on Earth Also known as the Blue Planet Mars Fourth planet from the Sun Also known as the Red Planet due to the presence of iron oxide on its surface Has a very thin atmosphere Contains enormous volcanoes, valleys, canyons, boulders, and clouds of red dust Outer Planets or Gas Giants Includes four planets: Jupiter Saturn Uranus Neptune Composed of mainly hydrogen and helium More massive than the inner planets The Asteroid Belt Lies between Mars and Jupiter Asteroids are small, rocky objects Believed to be left over from the beginning of the solar system Jupiter Largest planet in our solar system Covered by a layer of clouds made of chemicals, which give them a reddish or brownish color The Great Red Spot and other storms occur commonly on its atmosphere Saturn Sixth planet from the sun and the second largest Has thousands of rings around it that are made of ice, rock and dust Contains yellow and gold bands in its atmosphere due to fast winds and rising heat Uranus Seventh planet from the Sun Covered with thick, blue-green fog It is circled by rings Spins differently than others; seems to be lying on its side Neptune Coldest and furthest planet from the Sun Blue in color because of the methane gas found in its atmosphere Obtains strong winds that cause hurricane-like storms, like the Great Dark Spot Comets Small Solar System bodies that orbit the Sun Balls of rock and ice Known as “dirty snowballs” Grow tails or leave trails as they approach the Sun, which becomes illuminated and glows Moons Natural satellites that orbit planets or other small solar system bodies Only Mercury and Venus are moonless Earth has one, while Jupiter has 63 moons The End References Astronomy For Kids National Geographic http://www.kidsastronomy.com/ http://science.nationalgeographic.com/science /space/solar-system Wikipedia http://www.wikipedia.org/