compare aldebaran with sirius b. which star is hotter? which is brighter? how do you know?
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The Life Cycle of Stars
Do Now
Compare Aldebaran with Sirius B. Which star is hotter? Which is brighter? How do you know?
Agenda
Do Now Mrbrysonscience.wikispaces.com Life Cycle of Stars Simulation Exit Ticket
Stellar Variables
Heat Color Mass Life Cycle Size Luminosity/Magnitude/Brightness
Marbles and Washer in Balloons
Place washer in blue balloon Place black marbles in white balloons Place white marbles in red and
yellow balloons
When you start to blow, blow your balloon down towards the floor You don’t want to swallow the marble!
Masses of your stars
Red Star
Yellow Star
White Star
Blue Star
Mass of Star .4 Solar Mass(2/5 the mass ofour Sun)
1 Solar Mass (themass of ourSun)
8 Solar Masses (8times the mass ofour Sun)
16 Solar Masses(16 times themass of ourSun):
Galaxy 222
The balloons represent stars Every student has a star with a
different mass How is mass different from size?
Mass is the amount of matter in the object regardless of size.
Ex. computer and box
When your star has finished its cycle, follow along with the rest of Galaxy 222 and fill in the boxes on your worksheet.
In our Stellar Nursery
Red Star
Yellow Star
White Star
Blue Star
Blow up Balloon to about 3” diameter
Blow up Balloon to about 3” diameter
Blow up Balloon to about 3” diameter
Blow up Balloon to about 3” diameter
What’s happening right now in the nursery?
10 Million Years Old
Red Star
Yellow Star
White Star
Blue Star
Wait Wait Wait Blow slightly more air into the balloon.
This star is becoming a red giant.
11 Million Years Old
Red Star
Yellow Star
White Star
Blue Star
Wait Wait Wait Quickly blow up balloon until it is fully inflated. Pop balloon. Catch washer.
This star exploded in a supernova and became a black hole.
50 Million Years Old
Red Star
Yellow Star
White Star
Blue Star
Wait Wait Blow slightly more air into balloon.
This star is becoming a red giant.
Still a black hole.
55 Million Years Old
Red Star
Yellow Star
White Star
Blue Star
Wait Wait Quickly blow up balloon until fully inflated. Pop balloon. Catch marble.
This star exploded into a supernova and became a neutron star.
Still a black hole.
10 Billion Years Old
Red Star
Yellow Star
White Star
Blue Star
Wait Blow up a little bit.
This star is becoming a red giant.
Still neutron star.
Still a black hole.
12 Billion Years Old
Red Star
Yellow Star
White Star
Blue Star
Wait Blow up more.
This star is a red giant.
Still neutron star.
Still a black hole.
12.5 Billion Years Old
Red Star
Yellow Star
White Star
Blue Star
Wait Blow up a little more. Then cut up balloon into small pieces. Catch marble.
This star releasesits outer layers asa planetarynebula andbecomes awhite dwarf.
Still neutron star.
Still a black hole.
100 Billion Years Old
Red Star
Yellow Star
White Star
Blue Star
Deflate Balloon
This star becomes a white dwarf.
Still white dwarf.
Still neutron star.
Still a black hole.
Discussion
What was the effect of mass on life span?
Which stars deflated and which stars exploded?
What does this tell you about our sun?
Exit Ticket
Explain the effect of mass on a star’s life cycle?
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