E&S Practice Exam Semester 1

The Sun is made of...

• Water and Ice

• Hydrogen

• Magnesium

• Hydrogen and Helium

What happens during nuclear fusion

• Hydrogen reacts with Oxygen to create fire.
• Hydrogen atoms are forced together to create Helium
• Uranium and Plutonium split apart and release radiation.
• Helium atoms break down to make hydrogen

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Where does nuclear fusion occur?

• Space
• Radiation Zone
• Photosphere
• The Core

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This image shows the:

• Geocentric Solar System
• Heliocentric Solar System

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What model does this represent?

• Geocentric 
• Heliocentric 

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How does the sun keep all of the planets in orbit?

• The pull of its gravity
• the flames give it power
• the sun spots
• The solar flares guide them

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Most of the sun’s energy is a result of

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

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The Milky Way galaxy is thought to be a(n)

• spiral galaxy

• barred spiral galaxy.

• elliptical galaxy.

• irregular galaxy.

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What is the term used to describe a group of stars, dust, and gas bound together by gravity?

• comet

• nebula

• asteroid

• galaxy

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a gigantic explosion that causes the death of a large star

• pulsar
• red giant 
• supernova
• black hole