Transcript Life Cycle of a star Goes with graphic organizerx

LIFE CYCLE OF A
STAR
CHAPTER 3.1GRAPHIC ORGANIZER
FORMATION OF STARS
• Nebula: where stars are born
– Made of dust and gas
MAIN SEQUENCE
• Longest stage of a stars life
– Last as long as the star has enough gas
• The size of the star depends on how long they are in this stage
AVERAGE SIZE STARS
• Red Giants
– When a star uses up its hydrogen
– The helium begins to fuse into Carbon
• Then the core begins to collapse and the outer layers begin to expand a cool
• White Dwarfs
– When all the helium is fused up
– Fusion stops and shrinks
MASSIVE STARS
• Supergiants
– Similar Characteristics as a Red Giant, however, the end
product is a heavier atom like Iron
• When a supergiants core begins to collapse it turns into a
violent explosion
– Supernova
• Only occurs with Gold, Silver, and Uranium
• Can be as bright as a galaxy
AFTER A SUPERNOVA
• If remains of a supernova is so dense it becomes Neutron Star
– Made almost all of Neutrons
– More mass that the sun but only a few kilometers in diameter
• If the core of remaining is so massive (5X mass of Sun) becomes a
Black Hole
– So dense light cant even escape
– We know they are there because they effect the objects around them