Practice unit 5 exam

If the universe formed during the Big Bang and most objects are moving away from each other, what is happening to size of the universe?

• Universe is getting larger

• Universe is getting smaller

How old is the universe?

• 4.6 Billion Years

• 4.6 Million Years

• 13.7 Million Years

• 13.7 Billion Years

The distance light travels in a year (6 trillion miles) is called a(n)

• Light Year

• Astronomical Unit

The average distance between Earth and the sun is 93 million miles. This is called a(n)

• Light Year

• Astronomical Unit

Which of the following is NOT an evidence of the Big Bang?

• Red Shift

• Steady state

• Cosmic Microwave Background Radiation

• Nucleosynthesis

This element is the lightest,most abundant in the universe and is the key component of stars

• Hydrogen

• Helium

• Oxygen

• Carbon

The farther away galaxies are from us, the _______________ it is that they are moving away from us.

• more uncertain

• faster

• slower

• more unpredictable

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

• How the planets & moons formed.

• How our Universe began.

• How the sun turns hydrogen into helium.

• How fast light travels through space.

Which is currently the most supported theory about the future of the universe?

• The universe could remain exactly as it is today.

• Stars could burn out, causing the universe to become dark and cold.

• The universe may continue to expand.

• Gravity could pull galaxies back together, causing a reverse of the big bang.

The universe began as a singular ultimately dense point in space-time that hyper-inflated.

• True

• False