Name: Solar System Quiz Review 2 1. List the order of the planets from closest to the sun to the planet farthest away. Mercury , Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune 2. List the planets that have rings. Jupiter, Saturn, Uranus, and Neptune. 3. Why is Pluto is not considered a regular planet in our solar system? Pluto does not always have its own orbit. It sometimes shares Neptune’s. 4. What is the largest planet in our solar system? Jupiter 5. What does the term Perihelion mean? Perihelion means closest to the sun when a planet is revolving around the sun in an elliptical orbit 6. What does the term aphelion mean? Aphelion means farthest from the sun when a planet is revolving around the sun in an elliptical orbit. 7. What does making a model to scale mean when we refer to making a model of the solar system? It means the size of the model is greatly reduced but still remains in proportion to each other so they may be compared or visualized in relative size(they shrink down to a manageable size) 8. What planet orbits the greatest distance from the sun and why? Neptune orbits the greatest distance because it is farthest from the sun. 9. Why do we have seasons please explain? We have seasons because the earth is on its axis at an angle as the earth revolves around the sun. 10. Which planet has the shortest year and why? Mercury has the shortest year because it is closest to the sun and it has a shorter distance to revolve around the sun. 11. How many days are in earth’s year and why? On earth our year is 365 days because it takes 365 days for the earth to complete one revolution in its orbit around the sun. 12. How do we on earth have day and night? Our earth rotates on its axis as it revolves around the sun. It takes approximately 24 hours to complete a rotation on its axis. When we are facing the sun it is daylight as we rotate away from the sun it becomes night. 13. Does the sun really set and rise every day? No, the sun rotates away from and toward the sun creating the illusion of setting and rising. 14. What do we mean by moon phases? The moon is revolving around us like we revolve around the sun. The phases of the moon mean the part of the moon that we can see. 15. How many moon phases are there? There are 8 phases of the moon 16. Can you draw a picture of each moon phase, in order and label them.