Unit 9: Stars (Full Unit Review)

What happens in the Sun’s core?

• Solar flares

• Sunspots form

• Gravity disappears

• Nuclear fusion

Which layer of the Sun is the visible surface?

• Corona

• Photosphere

• Core

• Chromosphere

What is the Sun mostly made of?

• Oxygen and carbon

• Hydrogen and helium

• Iron and lead

• Water and dust

Next year, in university (or wherever you are!), someone you're talking to says that the fire on the sun will burn out in a few billion years.
Feeling really superior, you tell them, "___".

• No, it will burn out in a few million years.

• Yes, Mr. Wade taught me that in high school.

• No, the nuclear fusion will stop in a few billion years.

• You say nothing because this person is cute.

Reorder the layers of the Sun starting with the inside and ending with the corona.

• Chromosphere

• Core

• Photosphere

• Convection Zone

• Radiative Zone

The Sun doesn't collapse on itself or explode because of...

• The balance of gravity and pressure from nuclear fusion.

• It's too hot.

• Nuclear fusion holds the fire on the surface.

• The velocity of light spreading out from the surface.

What causes sunspots?

• Strong winds

• Heat from the core

• Magnetic fields

• Earth’s shadow

Sunspots are hotter than the areas around them.

• True

• False

CMEs are:

• Waves in the ocean of fire on the Sun

• Giant sunspots

• Charged particles ejected from the Sun

• Wind on the Sun's surface

What protects Earth from solar wind?

• Gravity

• Clouds

• Moon

• Its magnetic field