The Sun

The sun converts matter into energy in the

• corona.
• radiative zone
• convection zone
• core

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NGSS.HS-ESS1-1

Most of the sun’s energy is a result of

• nuclear fusion  
• nuclear fission
• atomic reactions
• coronal mass ejection

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NGSS.HS-ESS1-1

NGSS.HS-PS1-8

When hydrogen nuclei fuse into helium nuclei

• the nuclei die.
• energy is released.
• particles collide
• particles neutralize.

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NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Auroras are frequently seen

• near the equator.
• before a sunspot cycle.
• every 11 years.
• after solar flares.

Sunspots vary in a cycle that lasts about

• 110 yrs
• 11,000 yrs
• 11 yrs
• 110,000 yrs

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NGSS.MS-ESS1-1

Strong magnetic fields on regions of the sun lead to sunspots because

• convection slows and energy decreases.
• convection increases and energy increases.
• radiation slows and energy decreases.
• radiation increases and energy increases.

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NGSS.MS-PS2-5

What elements make up most of the sun’s mass?

• carbon and oxygen
• carbon and hydrogen
• helium and nitrogen
• hydrogen and helium

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NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Particles thrown off the sun’s corona that can affect Earth’s magnetic field are called

• a coronal mass ejection.
• a coronal mass reflection
• nuclear fusion
• sunspots

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NGSS.MS-ESS3-2

NGSS.MS-PS2-3

What are northern lights?

• Auroras
• solar flares
• prominences
• coronas

The middle layer of the sun's interior that contains very tightly packed gas is called the _____________.

• photosphere
• chromosphere
• radiation zone
• convection zone