Chapter 11.2 The sun & planets
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Transcript of Chapter 11.2 The sun & planets
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CHAPTER 11.2 THE SUN &
PLANETSBy Parm & Harman
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Formation of the Solar System• Formed 4.5 billion years ago • sun burst into existence and leftover material
formed the planets, moons and asteroids • First planets made were the inner planets
(Mercury, Venus, Earth, Mars) • The Jovian planets(outer) were formed from ice,
gas, and dust • The Jovian planets are Jupiter, Saturn, Uranus,
Neptune
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The Sun• Holds 99% of the mass of the solar system• Produces light and heat for the entire solar
system• Could hold 1.3 million earths inside of it • Composed of hydrogen gas
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6 Features to the Sun• Solar prominence: Large loops of super hot gas that
extend out of the sun’s surface • Sunspot: dark patches on the sun’s surface that are slightly
cooler, about 3500 degrees Celsius than surrounding areas • Photosphere: the thin outer layer of the sun, where hot gas
rises to the surface cools then sinks back into deeper layers
• Solar flare: extremely violent eruptions of gas from the sun’s surface that can last a few hours.
• Corona: the outermost part of the sun’s atmosphere, a layer of gas that can reach 3,000,000 degrees Celsius.
• Chromosphere: 3000km thick layer beneath the sun’s corona, composed of hot low density gas.
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Solar Wind • Hot energetic gases get ejected in a sudden
burst • Gas is spewed in every direction• When these gathers hit the earths magnetic
field it deflects the solar wind from north pole to south pole
• Some winds are so powerful they can disable satellites and knock out power supply on earth
• When solar wind hits the earths magnetic fields it creates an aurora
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The planets • To be, considered a planet the body:• must orbit one or more stars• Be large enough that its own gravity holds the
body in a spherical shape• Be only body occupying the orbital path.
• There are eight planets in our solar system Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
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QuestionsHow many planets are in our solar system?What are the Jovian planets?Name the planets in order.How where the planets formed?How is solar flare formed?
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Bibliographycosmoforkids.com/files/solsyst2_solarwind.htmlMcGraw Hill BC Science 9Wikipedia.org/wiki/sunWikipedia.org/wiki/solar_wind Wikipedia.org/wiki/planets