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The Sun: Our Very Own Star

The Sun: Our Very Own Star. Chapter 3 Section 2. Can you imagine what our life would be like if there was no sun. Takes up 99% of the mass of our solar system The Sun is a large ball the consists mainly of Hydrogen and Helium. Life Cycle of the Sun. Characteristics. Closest star to earth.

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The Sun: Our Very Own Star

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  1. The Sun:Our Very Own Star Chapter 3 Section 2

  2. Can you imagine what our life would be like if there was no sun. • Takes up 99% of the mass of our solar system • The Sun is a large ball the consists mainly of Hydrogen and Helium

  3. Life Cycle of the Sun

  4. Characteristics • Closest star to earth • The bright star in the center is Proxima Centauri • About 4.2 light years away

  5. Characteristics • No solid surfaces

  6. Characteristics • The core temperature is 27 Million °F • The surface temperature is 9,800 °F

  7. Characteristics • Energy releaser…

  8. Characteristics • It takes 8 ½ minutes for the light from the sun to reach Earth

  9. Structure of the Sun (pg 68) • Core • Radiative zone • Convection zone • Photosphere • Chromosphere • Corona

  10. INNER ZONE Core • Center of the sun • NUCLEARFUSION occurs here • High temperature • High pressure

  11. INNER ZONE Radiative zone • Energy moves by RADIATINGOUTWARD from core to convective zone

  12. INNER ZONE Convective zone • energy transferred by CONVECTION • warmer gasses RISE • cooler gasses SINK

  13. Atmosphere • Photosphere • gives off VISIBLE light

  14. Atmosphere Chromosphere • high activity of solar flares

  15. Atmosphere Corona • Outer most layer • Blends into space • Charged particles that escape corona create GLOWINGHALO

  16. Physical Features Sunspots • Occur in PAIRS • Some as large as 50,000 miles in diameter • Dark in color due to COOLERTEMPERATURES

  17. Physical Features Sunspots • 11 year cycle ( observed by Galileo) • Caused by powerful MAGNETICFIELDS

  18. Physical Features Solar Flares • Violent EXPULSIONS of gas • Occur when sunspots move CLOSE together • CREATE Solar winds

  19. Physical Features Solar Winds • CHARGED particles ejected from SUN • Flow from CORE towards edge of solar system

  20. Physical Features Solar Prominences • LOOPED ejection of gas • Occur when sunspots move towards each other, but don’t meet

  21. Outdoor Activity In a group of four • A meter stick • One orange circle (9 inches in diameter) • One Manila/transparency (Earth 2 millimeters • Measure the distance between earth and sun (24.5 meters apart)

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