1. Here are some slides to help you study. Note: Not ALL of the topics are included in these slides

2. What is a solar system? A region of space where the gravitational force of a star influences all other objects. In our solar system, the gravitational pull of the sun keeps the planets in orbit

3. Our solar system Our star, the sun, is the largest object in the solar system. Therefore, the sun is the object with the most gravitational force. Our solar system started about 5billion years ago. Our star has about 5 billion years left before it dies out.

4. Formation of our Solar System Formation of Solar System Video

5. Our Star: THE SUN A giant sphere made of plasma. Heat and light comes from nuclear fusion Medium-size star Formed 5billion years ago 93,000,000mi or 150,000,000km from Earth Will run out of Hydrogen, nuclear fusion will stop and the star will die in about 5billion years The largest object in our solar system The gravity holds all of the objects that make up our solar system in place.

6. The formation of our solar system. About 5 billion years ago… 1.There was a swirling cloud of dust and gas, known as a nebula. 2.Gravity pulls all the gas together until a huge mass is formed in the center of the nebula. Nuclear fusion occurs and the sun, a star, is formed. 3.The rest of the gas and dust from the nebula are brought together by gravity, forming the planets and other objects in our solar system. 4.The planets continue to revolve (spin) around the star, trapped within it’s gravitational pull.

7. Some solar system vocabulary Main IdeaDetails and examples OrbitThe path an object takes RevolutionThe RotationSpinning on an axis Axis

8. Main IdeaDetails Solar Distance Distance the planet is from the sun Year LengthThe time it takes for the planet revolves around the sun once Day LengthThe time it takes for the planet to rotate on its axis. GravityThe attractive force between 2 objects KEY FROM SOLAR WALK WORKSHEET

9. Main IdeaDetails moonAn object that revolves around a planet. A natural satellite MassThe amount of matter in an object DensityThe amount of mass in a given space. How compact the stuff is … More dense Less dense

10. A planet is…. an object that is a sphere Revolves around a star Large enough to have enough gravity to clear all objects out of it’s orbit Orbit is on the same plane

11. INNER PLANET (Terrestrial planet) Outer Planet (Gas Giants) Closer to the sunFarther from the sun SmallerLarger RockyGaseous Less massMore mass More Dense – More stuff packed in a space Less Dense-Less stuff packed into a space Close to each otherFar from each other HotterColder Longer day Rotate slower Shorter day Rotate faster Shorter year Revolve faster Longer year Revolve longer Less gravityMore gravity No RingsRings Less moonsMore moons

13. Comet: - Chunks of ice, dust & rock -Have a tail when close to sun -Elliptical orbit that goes into the kuiper belt Asteroid: - Made of rock (metals) -Found in the asteroid belt Meteoroid: -A chunk of rock/dust in space formed from comets or asteroids Meteor: Meteoroid that is going through the atmosphere. This is what a shooting star is. Meteorite: -Meteor hits the ground -a rock

14. Comet: Chunk of ice and dust