The Sun

What is the Sun classified as?

• A planet

• A galaxy

• A middle-sized yellow star

• A red giant

What is the name given to our Sun by scientists?

• Titan

• Sol

• Alpha

• Luna

How old is the Sun?

• 1 billion years

• 2.5 billion years

• 4.6 billion years

• 10 billion years

How much longer is the Sun expected to shine?

• 1 billion years

• 5 billion years

• 10 million years

• 100 billion years

What will happen when the Sun burns most of its hydrogen?

• It will become a black hole

• It will stop shining immediately

• It will enter a dying phase

• It will become a planet

What process does the Sun use to produce energy?

• Combustion

• Nuclear fission

• Nuclear fusion

• Radioactive decay

What element is primarily used as fuel in nuclear fusion?

• Oxygen

• Carbon

• Hydrogen

• Helium

What is the byproduct of nuclear fusion in the Sun?

• Nitrogen

• Helium

• Carbon dioxide

• Water vapor

What force in the Sun's core creates the high pressure needed for fusion?

• Gravity

• Magnetism

• Solar wind

• Radiation

What is the temperature at the Sun's core?

• 1 million Kelvin

• 5,800 Kelvin

• 10 million Kelvin

• 15 million Kelvin