The Sun

How many years ago did the Sun form?

• 4.5 billion years

• 5 billion years

• 3.5 billion years

• 6 billion years

What percentage of the Sun is hydrogen?

• 75%

• 91%

• 95%

• 85%

What is the Sun primarily made of?

• Solid metal

• Liquid lava

• Rock

• Gas and plasma

What is the Sun's core temperature?

• 50 million degrees Fahrenheit

• 100,000 degrees Kelvin

• 10 million degrees Celsius

• 27 million degrees Fahrenheit

What process creates helium in the Sun's core?

• Electrolysis

• Chemical reaction

• Thermonuclear fusion

• Photosynthesis

What is the term for the Sun's process of converting hydrogen into helium?

• Carbon dating

• Thermonuclear fusion

• Nuclear fission

• Photosynthesis

How many Earths could fit inside the Sun?

• 300

• 100

• 1000

• 600

What protects the solar system from harmful cosmic radiation?

• The ozone layer

• The magnetosphere

• The heliosphere

• The atmosphere

What phenomenon results from the Sun's magnetic field interacting with Earth's atmosphere?

• Rainbows

• Solar flares

• Auroras

• Lightning

What will happen to the Sun in about 6.5 billion years?

• It will turn into a black hole

• It will explode as a supernova

• It will become a white dwarf

• It will remain the same