Interstellar Medium Main Sequence Star Nebula Protostar Fusion

100

What is dust and gas?
These two things make up interstellar medium.

100

What is the lower edge?
Newly formed stars begin life at this edge of the main sequence.

100

What is nebula?
This is the Latin word for cloud.

100

What is a molecular cloud?
Protostars form from this.

100

What is nuclear?
This type of fusion occurs in a star.

200

What is hydrogen?
This gas makes up 75% of the interstellar medium.

200

What is H-R diagram?
Main sequence stars are on this diagram

200

What is dark nebula?
This type of nebula is dense clouds of gas and dust that obstruct the view of more distant stars.

200

What is main sequence?
Protostars turn into this type of star

200

What is helium?
Hydrogen atoms are turning into this atom.

300

What is helium?
This gas makes up 25% of the interstellar medium.

300

What is main sequence stars?
OBAFGKM

300

What is three?
There are this many types of nebulas.

300

What is thermal energy?
The protostar converts it's gravitational energy into this type of energy.

300

What is the core?
Fusion happens here in a star.

400

What is interstellar dust?
This makes up roughly 1% of interstellar medium.

400

What is energy?
Main Sequence stars release a tremendous amount of this.

400

What is reflection nebula?
This nebula is produced when starlight scatters from a dusty nebula.

400

What is 30 years?
The Sun took this long to reach the main sequence stage.

400

What is gravity?
The force of this slowly pulls together particles within a protostar.

500

What is a nebula?
This is a cloud of interstellar dust and gas within space.

500

What is 90%?
Percentage that an average star spends it's life on the main sequence.

500

What is emission nebula?
This nebula is produced when a hot star excited the gas near it to produce an emission spectrum.
 

500

What is the triple alpha process?
reactions that happen during fusion.

Birth of a Star

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