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Name: Lesson 2, Unit 5 Our Solar System (pgs. 342-353) Please use page 343 to define the following terms: Solar system:_____________________________________________________________ ________________________________________________________________________ Planet: _________________________________________________________________ Satellite: _______________________________________________________________ _______________________________________________________________________ Asteroid: _______________________________________________________________ _______________________________________________________________________ Comet:__________________________________________________________________ ____________________________________________________________________ Inner Planets: A _______________ ________________is made up of a star and all the objects that revolve(o_ _ _ _) around that star. ____________________ between the star and planet holds the planet in orbit around the star. Smaller objects that revolve around a planet are referred to as _______________________. The four inner planets are ____________________, ______________________, ________________________ and ______________________. Questions: 1) Why does Mercury’s temperature vary so drastically? 2) Why does Venus maintain a hotter temperature than Mercury? 3) How do scientists theorize that Mars once had liquid water? Fill in the table. Use miles for distance. INNER PLANETS Mercury Venus Earth Mars Diameter Dist. From sun Year length Weight(for 100 pound person on Earth) Outer Planets: In order from the sun, the five outer planets are _________________, ______________, ___________________, ____________________, and ______________________. Read these two pages and answer these questions about the outer planets. 1) The only planet in this group without rings is? 2) What is Saturn most noted for? 3) Which planet has the strongest winds in the solar system? How fast? 4) What is the Great Red Spot? 5) What is unique about Uranus? OUTER PLANETS Jupiter Diameter Dist. From Sun Length of year Interesting Fact Saturn Uranus Neptune Pluto Asteroids and Comets: The asteroid belt is located between Mars and __________________. Why are asteroids not considered planets? It is because they are too ________________. What is one hypothesis about this asteroid belt’s origin?_______________________________________________________________ ____________________________________________________________________. __________________ are other small rocks that travel through space and may enter Earth’s atmosphere. When they strike the Earth’s surface they are called ________________________. A ________________ is a ball of ice, rock, and gas that has an orbit which brings it really close to the sun on one end, and sometimes much farther than Pluto on the other end. Which one of these objects creates shooting stars?__________________________. An Astronomical Unit(AU) is a measurement of distance used to ease the burden when talking about massive distances in space. One AU is said to be the average distance Earth is from the sun (93,000,000 miles). Choose a planet or two, and figure out how many AUs it is from the sun and Earth. Mnemonic devices are used to help us remember certain things. An example is Never Eat Soggy Waffles, which helps to remember the order of cardinal directions; north, south, east and west. Below, come up with your own, creative mnemonic device to help you remember the order of planets moving away from the sun. Have fun, but use it to help you get this order to memory. If you are finished with the other three pages, use this side to draw a picture of our solar system. Include everything you have learned about in this lesson and the last. Make it “pop”.