Glossary
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Transcript of Glossary
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Date: Feb 10, 2014Page: Table of Contents p 18
W.O.D: Last 5 pages Warm-ups: Front Cover
W.O.D. Density -the degree of compactness of a substance; the mass of an object divided by its volume (D= m/v)
Question: Which would be more dense: a ball of styrofoam, or a ball of clay?
Glossary
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Today’s Plan
• Warm-up• Finish Extreme Stars• Solar system formation notes• Reflection
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Astronomy Table of Contents (p. 18)Title Page Number:Sun Notes/Nuclear Fusion W.S. p. 19Periodic Table/Electromagnetic Spectrum p. 20
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What is the sun made of? (draw)
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Solar System Formation Notes
1. Why does the center of a collapisng nebula form a star?
2. How do planets form?3. Which planets are most
dense?4. Which planets are least
dense?5. What does E = MC2
mean?
Try to answer these questions on your own. We will review the answers as a class. Write the answers to 3 and 4 in order from the sun.
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Why does the center of a collapisng nebula form a star?High temperatures cause pressure to become so intense that the crowded atoms fuse (nuclear fusion) and give of large amounts of energy.
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How do planets form?
Particles swirling in a cloud of dust and gas stick together as they rotate around the forming sun.
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Which planets are most dense?The rocky (terrestrial) planets are the most dense and closest to the sun:MercuryVenusEarth Mars
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4. Which planets are least dense?
The gas giants are furthest from the sun, and have the lowest density.JupiterSaturn Uranus Neptune
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5. What does E = MC2 mean?
Energy = Mass X Speed of Light squared.
C, the speed of light, is a very large number: 299 792 458 m / s (700 million miles an hour)
Even if M is very small, huge amounts of energy can be produced.
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Reflection:Draw a hydrogen atom.