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Earth Science Final Review: HR Diagrams/Star Formation Flashcards | StudBud
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Earth Science Final Review: HR Diagrams/Star Formation
What is the purpose of an HR Diagram?
Our Sun is about:
Earth Science Final Review: HR Diagrams/Star Formation
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1
Our Sun is about:
4.6 million years old
4.6 billion years old
4.6 trillion years old
4.6 thousand years old
2
What is the purpose of an HR Diagram?
To compare ages of stars
To see what the biggest stars are
To show distance from Earth to a star
To classify stars
3
A baby star is known as a:
Protostar
Cute little thing
Prestar
Popular Star
4
As a molecular cloud collapses for star formation, pressure/temperature/gravity:
Stay steady
Go on a date
Decrease
Increase
5
When a star's core heats up but it's surface cools down & expands, it's in this stage of life:
Red Giant
Main Sequence
Supernova
White Dwarf
6
Stars spend most of their life on this portion of the HR Diagram:
Top right
Top left
Middle
Bottom left
7
To become a "full fledged" star, a star must:
Fuse hydrogen in its core
Fuse hydrogen on its surface
Fuse carbon in its core
Fuse oxygen in its core
8
One of the 2 things that can happen to "get the ball rolling" for star formation is:
Pressure decreases in molecular cloud
Collision of stars
Collision of molecular clouds
Gas escaping grasp of galaxy
9
Which of the following IS not shown on an HR Diagram?
Size of star
Color of star
Brightness of star
Temperature
10
The Sun is currently in this stage of life:
White Dwarf
Red Giant
Planetary Nebula
Main Sequence
