Science unit 2

Stars that live in large groups are called...

• Galaxies

• meteor

• light years

What is our galaxy called?

• big bang

• The milky way

• billion stars

How many stars are in our galaxy?

• 35 billion stars

• 200 billion stars

• 400 million stars

what are the 3 main forms of galaxies

• milky way

• spiral

• elliptical

• irregular

What form is our galaxy

• irregular

• elliptical

• spiral

Who made the discovery that the universe was expanding?

• Albert Einstein

• James Charles

• Edwin Hubble

• Ben Franklin

How big is the milky way

• about 100 light years in diameter

• about 100,000 light years in diameter

• about 10 light years in diameter

Did the universe used to be hot and dense 13.8 billion years ago?

• True

• False

What is the big bang theory?

• The idea that the earth will crumble to pieces in 3 years

• The idea of the universe disappearing.

• it is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!

What was the universe made of at the very begging?

• helium and hydrogen

• Love

• Water