Download A Star is Born worksheet and key

A Star is Born Presentation: Worksheet
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Where are all stars formed?
What are the three main types of stars? What are they based on?
List the lifecycle of a Giant star.
If a star is blue, what does that reveal about its temperature?
How is the brightness of stars measured?
What is the lifespan of red dwarfs?
What is the lifespan of stars similar to the Sun?
How is a red giant/supergiant formed?
What activities take place when a red giant’s core is contracting?
How is a planetary nebula formed?
For how long do white dwarfs radiate their leftover heat?
How long is the life phase of a red supergiant?
What’s two differences between red giants and red supergiant’s?
What temperature does the core increase to? What causes this?
What is a neutron star?
A Star is Born Presentation: Answer Key
1. Where are all stars formed? All stars, despite their size, are formed in a nebula.
2. What are the three main types of stars? What are they based on? The stars are based on their
size. Sun-like stars have a mass up to 1.5 times the size of the Sun. Huge stars have a mass from
1.5-3 times of the Sun. Giant stars have a mass over 3 times of the Sun.
3. List the lifecycle of a Giant star. Giant: Red Supergiant  Supernova  Black Hole
4. If a star is blue, what does that reveal about its temperature? It is extremely hot
5. How is the brightness of stars measured? By their magnitude
6. What is the lifespan of red dwarfs? Trillions of years
7. What is the lifespan of stars similar to the Sun? 10 billion years
8. How is a red giant/supergiant formed? The outer layers expand, while the core contracts.
9. What activities take place when a red giant’s core is contracting? The helium atoms fuse
together to form carbon atoms which releases energy
10. How is a planetary nebula formed? When the outer layers of the red giant drift into space.
11. For how long do white dwarfs radiate their leftover heat? Billions of years.
12. How long is the life phase of a red supergiant? Millions of years.
13. What’s two differences between red giants and red supergiant’s? Their size, and the core fuses
into denser elements.
14. What temperature does the core increase to? What causes this? The crashing of iron atoms
causes the temperature in the core to increase to 100 billion degrees.
15. What is a neutron star? An extremely dense and small star that remained after the supernova,
with a strong magnetic field and spins rapidly.