The Sun

The energy from the sun is created by a process called:

• nuclear fission
• nuclear fusion
• nuclear reaction
• nuclear core

Energy is created in the core when two _____________ atoms join together to form a ______________ atom.

• helium, hydrogen
• carbon, hydrogen
• nitrogen, helium
• hydrogen, helium

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

• photosphere
• chromosphere
• radiation zone
• convection zone

When we look at the sun, what layer are we viewing?

• photosphere
• chromosphere
• corona
• convection zone

The particles of the corona extends into space for millions of kilometers and spreads into streams of electrically charged particles called:

• coronal discharge
• solar flares
• coronal ejection
• solar winds

Areas of gas on the sun's surface that are cooler than gases around them are called:

• corona
• prominences
• sunspots
• solarspots

The number of sunspots on the sun varies in a cycle that is about how long?

• 6-8 years
• 10-11 years
• 12-15 years
• 365 days

Huge loops of reddish gas that connect sunspots are called:

• prominences
• solar flares
• coronal loops
• solar wind

When prominences erupt into space releasing gas and energy we call this: 

• solar winds
• coronal outburst
• solar flares
• auroras

What is the sun mostly made up of

• Helium
• Core
• Carbon
• Hydrogen