1. The Solar System WOOOOOOOOOO

2. WWK The origin of the solar system and the planets that make it up

3. Origin Estimated to have begun 4.568 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the sun, while the rest flattened into aprotoplanetary disk, out of which the planets, moons, asteroids, and other small solar system bodies formed.

4. The Sun Center of the solar system and holds 99.86% of the mass in our solar system, with most of the rest belonging to Jupiter. Energy comes from many hydrogen nuclear fusion reactions at its core.

5. Mercury 1 st planet. Smallest and closest planet to the sun. It has a large iron core and a thin mantle layer, possibly due to constant impacts which prevent its layers from developing over time

6. Venus 2 nd planet from the sun and slightly smaller than earth. Hottest planet(over 400 degrees Celsius) and has an extremely toxic atmosphere due to clouds of sulfuric acid.

7. Earth 3 rd from the sun and largest of the inner planets. Only planet that sustains life (that we know of…….) and is the only planet with tectonic plates

8. Mars 2 nd largest inner planet and 4 th from the sun. Has a carbon dioxide atmosphere Two moons: Deimos and Phobos Reddish color due to large amounts of iron- oxide on its surface

9. Jupiter Size of 318 earth masses and has 2.5 times the mass of all the other planets combined and composed mostly of hydrogen and helium. Great Red Spot is actually a continuous storm which has endured since the 17 th century

10. Saturn 6 th planet from the sun and second largest overall and the least dense( specific gravity is 0.7 which is less than water) Rings composed primarily of water ice, but may also include rocky particles with icy coatings.

11. Uranus 7 th planet from the sun and 3 rd largest overall composed of 83% hydrogen, 15% helium, 2% methane and small amounts of acetylene and other hydrocarbons. Methane gives it its blue-green color

12. Neptune 8 th and farthest planet from sun. 17 times the mass of Earth and is slightly more massive than its near-twin Uranus. Atmosphere has active and visible weather patterns.