Brightness of Stars Review

What are stars born from?

• Enormous clouds of dust and gas

• Large rocks and minerals

• Water and ice

• Metal and stone

What are nebulae mostly made up of?

• Oxygen and nitrogen

• Carbon and iron

• Helium and hydrogen

• Water and salt

How do scientists classify stars?

• By their size

• By their temperature

• By their distance from Earth

• By their age

What is the temperature of the coolest stars?

• 10,000 degrees Fahrenheit

• 5,000 degrees Fahrenheit

• 20,000 degrees Fahrenheit

• 15,000 degrees Fahrenheit

What color do cooler stars appear?

• Blue

• Green

• Red

• Purple

How far is the Lagoon Nebula from Earth?

• 2,000 light-years

• 3,000 light-years

• 4,077 light-years

• 5,000 light-years

What happens to the gases in a nebula over time?

• They form planets

• They form stars

• They form comets

• They form asteroids

What color do stars appear as they cool down?

• Blue

• White, then yellow and orange

• Green

• Purple

What is the main component of stars that makes them shine?

• Water

• Dust

• Helium

• Iron

What is the temperature range of the hottest stars?

• Up to 50,000 degrees Fahrenheit

• Up to 100,000 degrees Fahrenheit

• Up to 150,000 degrees Fahrenheit

• Up to 200,000 degrees Fahrenheit