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A n I nterview with M r. S ol Questions you answer on your whiteboard Notes you write in your notebook Title for today’s notes: Our Sun
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A n I nterview with M r. S ol How does the sun fit into the galaxy? Draw your explanation on your whiteboard
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A n I nterview with M r. S ol The sun describe its job as just sitting around making hydrogen into helium. Whiteboard Question: What is this process called?
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Fusion: Lighter nuclei (like Hydrogen) are fused together to form heavier nuclei (like Helium and other elements) and release energy
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A n I nterview with M r. S ol The sun mentions the tragic death of a star right in our neighborhood. Can stars die?
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A n I nterview with M r. S ol The sun says he's made up of the right stuff. What is that? Hydrogen, Helium and other elements in plasma state of matter plasma: very hot gasses made of positive ions and negative electrons
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The Sun’s Interior Central Core: hottest, densest part (15 million degrees, 12 times more dense than Lead) – where energy is produced by fusion Radiation Zone: particles here re-radiate energy made in the core – Radiate: to emit energy in the form or rays or waves
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Convection Zone: turbulent layer of gasses that is stirred by convection. – Convection: transfer of heat in a liquid or gas in a circular motion – Gasses emit energy as they reach the surface
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Use information from the interview to locate the sun Sketch the diagram and add the sun’s location on your whiteboard
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The Milky Way Galaxy
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The Planets
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The Sun’s Surface & Atmosphere Photosphere: (sphere of light) – Glowing plasma – Emits energy – Sun Spots – cooler regions – Solar Flares
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Sun spots Appear dark due to difference in temperature – Umbra – darker area – Penumbra – lighter region around the umbra. Average size is about the same size as the Earth
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Solar Flares What is a solar flare? Use words and a picture
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Solar Flares Very large explosions; plasma interacts with magnetic field Heat to several million degrees F Release as much energy as a billion megatons of TNT Occur near sunspots
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Chromosphere: (sphere of color) – Above Photosphere – Reddish glow – Only seen during solar eclipse Corona: (crown) – Streams of high temp plasma – Only seen during eclipse
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https://www.youtube.com/watch?v=sLkGSV9 WDMA https://www.youtube.com/watch?v=sLkGSV9 WDMA https://www.youtube.com/playlist?list=PLHSo xioQtwZcJj_9clLz7Bggso7qg2PDj https://www.youtube.com/playlist?list=PLHSo xioQtwZcJj_9clLz7Bggso7qg2PDj
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Ticket to Leave: F L A R E
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Relative Size of Sun & Planets If the Sun were the size of a basketball: – Earth would be the size of a pea 107 feet away – Mars would be the size of a bb 164 feet away – Jupiter would be the size of a ping pong ball 550 feet away – Saturn: 1020 feet away – Uranus: 2050 feet away – Neptune: 3100 feet away – Pluto: grain of salt 3300 feet away A mile is 5280 feet
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Star Life Cycle Vocabulary Red Giant Supernova White Dwarf Black Hole Protostar Hertzsprung-Russell Diagram (H-R Diagram) Apparent Brightness Nebula Neutron Star Main Sequence
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