The Sun

What is the outermost part of the Sun's atmosphere called?

• The photosphere

• The corona

• The chromosphere

• The core

What percentage of the solar system's mass is made up by the Sun?

• 95.5%

• 98.5%

• 99.8%

• 90.2%

What are the two main elements that make up the Sun?

• Oxygen and nitrogen

• Carbon and oxygen

• Helium and oxygen

• Hydrogen and helium

What is the temperature of the Sun's core?

• 4 million degrees Celsius

• 10 million degrees Celsius

• 6,000 degrees Celsius

• 15 million degrees Celsius

In which layer of the Sun does nuclear fusion take place?

• Radiative zone

• Convection zone

• Core

• Photosphere

How long might it take a photon to travel through the radiative zone?

• 50 million years

• 1 million years

• 10 million years

• 100 million years

What is plasma?

• A solid material

• A cold gas

• An electrically charged, superheated gas

• A liquid material

Which layer of the Sun is considered its visible surface?

• Corona

• Chromosphere

• Photosphere

• Convection zone

What happens in the convection zone?

• Nuclear fusion occurs

• Hot material rises, cools, and sinks repeatedly

• Light particles bounce around

• Gas jets shoot upward

During a solar eclipse, what allows us to see the corona?

• Special telescopes

• The Moon blocking the Sun's bright light

• Increased solar activity

• Earth's atmosphere