Big Bang Theory Pop Quiz

How many years ago did the Big Bang happen?

• 100,000

• 14 billion

• 5 million

• 4 billion

What is the only thing that existed before the Big Bang?

• Protons and neutrons

• Electrons

• Hot, dense energy

• Time and matter

What allowed atoms to form?

• The universe cooling down

• The universe getting hotter

• The universe expanding

• Atoms always existed

What two gases were the first to form?

• oxygen

• hydrogen

• air

• helium

What did the first gases form?

• planets

• black holes

• stars

• moons

Red light shift is evidence that what is happening to the universe?

• It is expanding

• It is shrinking

• It is staying the same size