Role of Nuclear Fusion Stars

In nuclear fusion, smaller atoms are forced together to create larger atoms. Does this process release, absorb or maintain energy?

• Absorb energy

• Maintain energy

• Release energy

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NGSS.HS-ESS1-1

Do all stars make energy through fusion?

• Yes

• No

• Just our sun

• Only large stars

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When hydrogen is "fused" together on the Sun, what new element is created?

• Helium

• Carbon Dioxide

• Oxygen

• Light

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NGSS.HS-PS1-8

Stars have loads of proton - proton chain reactions happening in its core. What charge do protons have?

• neutral - no charge

• positive

• negative

• neutrino

The nuclear process that combines light elements into heavy elements to produce the energy in Stars is called

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NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Nuclear fusion powers the Sun and other stars. Which of these statements correctly describes what happens during nuclear fusion in stars?

• Hydrogen nuclei combine to become a helium nucleus, absorbing energy

• Helium nuclei combine to become a hydrogen nucleus, releasing energy

• Hydrogen nuclei combine to become a helium nucleus, releasing energy

• Helium nuclei combine to become a hydrogen nucleus, absorbing energy

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NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Which process produces large amounts of energy in a star by combining lighter elements into a

heavier element?

• convection

• nuclear fusion

• radioactive decay

• radiation

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Stars make Energy by the process of

• Nuclear Fusion

• Nuclear Fisson

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During nuclear fusion, what two main elements fuse together in Main Sequence stars?

• Nitrogen and Hydrogen

• Hydrogen only.

• Hydrogen and Helium

• Elements are not fused in stars.

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NGSS.HS-PS1-8

Every second the Sun converts 700 million tons of hydrogen (H) into 695 million tons of Helium (He). What happens to the other 5 million tons?

• It evaporates into nothingness.

• It is converted into light.

• It is converted into carbon (C).

• It is jettisoned off into space.

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