or Google Search title below Classzone: Observe the life stages of stars from birth to death. While looking at interactive, answer questions below.
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1 no=visualization or Google Search title below Classzone: Observe the life stages of stars from birth to death. While looking at interactive, answer questions below. Classzone: Observe the life stages of stars from birth to death What do all stars have in common? 1 What is the life cycle (trend) for stars with less than 8 solar masses? What is the life cycle (trend) for stars with 8 to 15 solar masses? What is the life cycle (trend) for stars with more than 15 solar masses? So what are star lives dependent on? Don t put computer away, you will need it again. Watch The Universe: Life and Death of a Star video clip until 19:19. Answer questions below while watching. The Universe: Life and Death of a Star What is the key component of stars? What pulls parts of the cloud of gas and dust together? What does thermonuclear fusion mean? 1
2 2 If you have fusion then you have a What is gravity trying to do to the star? What is fighting against gravity in a star? A star spends most of its life in this balance between fusion providing pressure to fight against the force of gravity inward. What is this stage called? What does the color of the star tell you? What is the most common type of main sequence star in the universe? What is on the other end of the main sequence stars? What is the most important thing that drives the life of a star? Which size of a star lives longest? How long can a star remain a main sequence star? What does a star need to begin doing to survive gravity crushing in on it? What does the heat from the helium fusing (burning) cause the star to do? What happens to the gases on the outer parts of the star? Why? What happens to the center of a sun-like star? What is the final stage of a sun-like star? 2
3 3 When the video clip gets to 19:19, then go to second interactive below. or Google Search title below Classzone: A Star s Size. Classzone: A Star s Size (Watch the interactive) Where does a star begin its life? What heats the material in the nebula? When is a star born? Where does a star spend most of its life? What determines the size of a main sequence star? To get to the next interactive, look at bottom of this website page and notice numbers. Click-on the next number, 2. Classzone: Hydrogen Fuel Gauges (Watch the interactive) What is the primary fuel for stars? Do bigger or smaller stars burn fuel faster? Classzone: Massive Sequence (Watch the interactive) After a massive star s hydrogen is depleted in the core, what does it use for nuclear fuel? What is its end stage? 3
4 4 Classzone: Stars Like the Sun (Watch the interactive) How does a medium-sized star grow as it runs out of hydrogen fuel? How is a planetary nebula different from a supernova? Classzone: Small Stars (Watch the interactive) What does a small star do most of its life? Classzone: Initial Mass Versus Final Size (Watch the interactive) How does the initial mass of a star compare to its final size? Put computer away and continue watching, The Universe: Life and Death of a Star video clip starting at 23:18. Answer questions below while watching. What can massive stars to fuse when they run out of helium to fuse? Why can t a massive star fuse iron together? What happens when gravity crushes the core of a massive star? What do supernova s provide the universe? Where did the heavy elements in your body (carbon, calcium, etc.) come from? What happens to the center of a massive star? What happens to the center of very massive stars? 4
5 5 OTS 44 Alpha Centauri A R136a1 Gliese 229B Delta Pavonis P Cassiopeiae Epsilon Indi BB Beta Hydri RW Cephei Teide 1 Chara 19 Cephei DENIS Mu Herculis Aa P Cygni 5
6 6 Epsilon Indi BA 61 Virginis HD Gliese 570D Kappa Ceti WR42e LP Iota Persei Arches-F9 V1581 Cygni C Muphrid A N Carinae A Gliese 165B Zeta2 Reticuli NGC A1 Gliese 623B 58 Eridani Arches-F1 LHS 1070B Alshain A KY Cygni LHS 1070C 47 Ursae Majoris R145 Ross 614B Mu Arae HD Teegarden s Star 51 Pegasi NGC 3603-C Van Biesbroeck s Star 70 Virginis Melnick 42 Gliese 105C Pi Mensae Cygnus OB2-12 LHS 292 BE Ceti Arches-F7 DX Cancri 23 Librae HD 93129A Van Briesboeck 8 Lambda Andromedae A Pistol Star AB Doradus C Rho Indi WR20a OGLE-TR-122b 109 Piscium Peony Star Wolf 359 HR 3497 A R126 Oph1622 A HR 2622 Plaskett s star Oph 1622 B BD AG Carinae 2M Librae S Doradus 6
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