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The Big Bang
Life Cycle of Stars
H-R Diagram
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100

what is the birth place of all Stars

Nebula

100
How old is the universe according to The Big Bang?
13.7 billion years old
100
What is a giant cloud of gas and dust called?
Nebula
100
What are the 2 variables on an H-R Diagram?
Luminosity and Temperature
100

Use the H-R Diagram to answer this: Are Blue Giants hotter or colder than Red Supergiants?

Hotter

200

Forms when very massive stars collapse at the end of their life cycle

Black hole

200
What was the first element created after the big bang?
Hydrogen
200
What is nebular hypothesis?
Most widely accepted explanation of how the solar system formed.
200
Most stars on the H-R Diagram are classified as:
Main Sequence Stars
200
What came before The Big Bang?
We don't know... there is no evidence to find out.
300

Layers : Earth as _________: to Sun

Gas

300

Fusing elements together under intense heat and pressure to create new elements is known as what?

Nuclear Fusion

300
Explain what will happen to our Sun in the next stage of its life.
It will become a white dwarf- meaning it will collapse into itself, shrink to become very hot, and then eventually the light will fade.
300
Using the H-R Diagram, what is the approximate temperature of our Sun?
6,000-7,000 K
300
What is nuclear fission?
Splitting the nucleus of an atom.
400

The distance light travels in one year

Light year

400
Name 2 terrible nuclear Energy events in history

Chernobyl, 3 mile island, fukushima, the bombing of Japan, 

400
Explain the life cycle of a Supergiant.
Supergiant will eventually turn into a supernova because the iron core explodes, then it could become a neutron star or a black hole.
400
Which stars have the highest luminosity and the highest temperature?
Blue Giants
400

what type of galaxy is the Milky Way

spiral galaxy

500

How long does it take the suns light to reach Earth? be specific

8.4 minutes

500
Explain how we know there is dark matter around the "outside" of our galaxy.
It is moving just as quickly on the outside of the galaxy as it is on the inside where there is a lot of mass, so there must be a lot of mass on the outside as well, we just can't see it.
500
Explain why a star could become either a neutron star or a black hole.
Depends on the mass- smaller mass leads to a neutron star, a larger mass leads to a black hole.
500
Which type of stars have really high luminosity but very low temperature?
Red supergiants
500
The nebular hypothesis states that the solar system formed about how many years ago?
4.6 billion years ago