Unit 3 Lesson 8

Most scientists believe the Big Bang Theory explains which of the following questions?

• How our planets and moons formed

• How our universe began

• How the sun turns hydrogen into helium

• How fast light travels through space

How old do scientists think the Universe is?

• 13.8 billion years old
• 4.5 billion years old
• 24,000 years old
• 5 years old

Which elements are most

abundant in the visible

universe?

• Helium and Carbon

• Carbon and Oxygen

• Hydrogen and Oxygen

• Hydrogen and Helium

The universe is expanding!  This means that:

• all of the galaxies are spreading out.
• the universe must have started from a single point.
• the universe is cooling down.
• all of the above.

Why is the light from distant galaxies red-shifted?

• They produce more red light than nearby galaxies

• They are moving away from us

• The longer wavelengths are filtered out more by dust

• They are moving toward us

Which scientists was responsible for coining the phrase “Big Bang?”

• Fred Hoyle

• Albert Einstein

• Sir Isaac Newton

• Edwin Hubble