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The Sun – Our Day Star

The Sun – Our Day Star. Do Now. Pick up your ISN from the desk Take out your HW from the weekend Write down tonight’s HW in your planner Label pages of your ISN: Page 32: Seasons Quiz Page 35: What is the structure of the sun? . Our Sun – A Day Star. Why is the sun a DAY STAR?

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The Sun – Our Day Star

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  1. The Sun – Our Day Star

  2. Do Now • Pick up your ISN from the desk • Take out your HW from the weekend • Write down tonight’s HW in your planner • Label pages of your ISN: • Page 32: Seasons Quiz • Page 35: What is the structure of the sun?

  3. Our Sun – A Day Star • Why is the sun a DAY STAR? • Formed 4.6 billion years ago – the same time as Earth! • The sun is made up of Helium (He) and Hydrogen (H) gasses.

  4. The Sun’s Layers • Energy is generated in the core of the sun and travels outward through the convection zone and radiation zone • Photons: Charged particles of light

  5. The Sun’s Atmosphere • Photosphere: (photo = light) Light is given off • It takes 10,000 years for light to travel from the core of the sun outward • Chrosmosphere: above the photosphere • Corona: Temperatures are 12,000,000 degrees F! • Solar wind (charged particles) come from the corona • The location of solar storms • http://www.pbs.org/wgbh/nova/labs/lab/sun/1/1/

  6. Surface Features • Sunspots • Cooler areas on the surface of the Sun • Observed by Galileo Galilei • Helped scientists discover that the Sun rotates • Cycles every 10-11 years (last one in 2012).

  7. Flares and Prominences • Blasts from the sun • Solar flares: violent eruptions of gas • Coronal Mass Ejections (CMES): electrically charged gas is ejected from the corona • Can interfere with satellites on Earth • Disrupts cell service and plane navigation • Can cause auroras

  8. Aurora Borealis • http://video.nationalgeographic.com/video/news/environment-news/norway-aurora-borealis-vin/

  9. The Sun Video • Summarize the ways in which NASA has been studying the sun in recent years. • http://www.jpl.nasa.gov/video/index.php?id=828

  10. Page 34 of ISN • Summarize what astronomers looked for on the Sun’s surface and what information these items provided about the sun. • Compare and contrast the layers of Earth and the layers of the sun. Sketch the sun an include the layers of the Sun in your journal. • What are space storms and how could they affect you? • Describe the path that a photon would take from the center of the sun’s core outward (you may draw if you wish).

  11. Page 37: How does the Sun Shine? To understand something as large as the sun…. …..we have to start very, very small What can you think of that has a smaller object inside of another? http://htwins.net/scale2/

  12. Atoms • Atoms are the building blocks of matter (anything that takes up space) • They contain: • A proton – a sub-atomic particle with a positive charge • A neutron – a sub atomic particle with no charge • An electron – a sub-atomic particle with a negative charge

  13. Elements • Atoms of the same kind (same number of protons) are called elements • There are 118 elements on the periodic table

  14. Atoms can combine Atoms can combine to create something new. ….just like ingredients can combine to create a cake!

  15. ReactantsProducts! Hydrogen + oxygen Water Ingredients Dessert!

  16. Fusion: The Sun’s Energy • To Fuse = to combine • Combining of two or more atoms • A process that occurs in all stars • Provides a LOT of energy for a small amount of matter

  17. Fusion in the Sun H + H ---------- He + energy Hydrogen atoms combine into Helium and release ENERGY!

  18. Einstein Einstein discovered that mass loss in a reaction can be converted into energy E = mc2 E = energy m = mass c = the speed of light

  19. Aha Connections • Pages 20-21 • Answer the question about motion based on what you learned about the sun today • Answer the question “How does Earth support life” using any information from this week or last.

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