The difference between stars and our sun is

• stars are a great distance away

• stars Do not produce heat.

• stars Are very small

• stars are A different color

The material to form a star comes from

• Black holes

• Nubes

• neutron clouds

• nebula

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A star is formed when:

• nuclear fusion begins

• a nebula becomes a protostar

• a supernova occurs

• All hydrogen is changed to helium

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The last phase of our sun with no nuclear fusion:

• White Dwarf

• Supernova

• Red Supergiant

• Black Hole

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A star that has used all its hydrogen, expands and now fuses helium to carbon and oxygen

• Neutron Star

• White Dwarf

• Red Giant Star

• Black Hole

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What do main sequence stars use for nuclear fusion?

• Oxygen

• Hydrogen

• Carbon

• Iron

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Our sun is currently in what star stage?

• Protostar

• Nebula

• Main Sequence

• Red Giant

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______ is a force that causes gas and dust particles to come together in a nebula.

• nuclear fusion

• gravity

• hydrogen

• friction

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Stars die because

• They don't have materials for nuclear fusion

• Gravity pulls them apart

• The stars collide.

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NGSS.HS-ESS1-1

At 15,000 degrees Celsius, hydrogen atoms unite to form helium atoms and energy is released in a process called

• supernova

• pulsar

• nuclear fusion

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