The Big Bang Theory

Question 1

If a star's spectral lines are blueshifted it means

Accepted Answer

That the star is getting closer to Earth

Question 2

This spectrum from a distant galaxy shows

Accepted Answer

Blueshift

Question 3

H and He as the most common elements supports the Big Bang Theory because...

Accepted Answer

It is consistent with what the Big Bang Theory predicts.

Question 4

Redshift is objects moving away.

Accepted Answer

False

Question 5

Which of the following events are in the correct order from oldest event to most recent?

Accepted Answer

Universe expansion, galaxies, solar system

Question 6

What does it mean if a star's spectrum is redshifted?

Accepted Answer

It means the star is moving away from the Earth.

Question 7

Hydrogen and carbon are the two most common elements in the universe.

Accepted Answer

False

Question 8

According to evidence that supports the Big Bang theory, scientists believe the universe is

Accepted Answer

13.7 billion years old

Question 9

Light from galaxies moving away is redshifted because...

Accepted Answer

Wavelengths appear stretched/longer

Question 10

Why is the Big Bang Theory the most accepted theory of how the universe was formed?

Accepted Answer

It is the best explanation based on current scientific evidence.

Question 11

The Cosmic Microwave Background is the leftover matter from the Big Bang.

Accepted Answer

False

Question 12

Which wavelength of visible light has the lowest frequency.

Accepted Answer

Red

Question 13

Which theory states that the Universe began as a small, dense point and then began to expand?

Accepted Answer

The Big Bang Theory

Question 14

The Cosmic Microwave Background exists because of which scientific law?

Accepted Answer

Conservation of Energy

Question 15

A common characteristic in galaxies spectra that they are moving away from Earth is...

Accepted Answer

They are redshifted

Question 16

A change in frequency or wavelength due to a moving source of sound waves is due to the

Accepted Answer

Doppler Effect

Question 17

This distant galaxy is moving

Accepted Answer

Toward Earth

Questions 17