What is the primary composition of stars?

• Hydrogen and helium

• Oxygen and nitrogen

• Carbon and iron

• Silicon and magnesium

Which color of star is the hottest?

• Blue

• White

• Yellow

• Red

What is the surface temperature range of white stars?

• 7,500 to 10,000 Kelvin

• 5,000 to 7,500 Kelvin

• 3,500 to 5,000 Kelvin

• Below 3,500 Kelvin

Which star is an example of a blue star?

• Rigel

• Sirius

• Arcturus

• Proxima Centauri

What is the lifespan of yellow stars like our Sun?

• Around 10 billion years

• A few million years

• Several hundred million years

• Tens of billions of years

Which color of star has the longest lifespan?

• Red

• Blue

• White

• Yellow

What does the color of a star indicate?

• Temperature, size, and lifespan

• Distance from Earth

• Chemical composition

• Age of the star