8.ESS1.1 (TN) (Redshift, Doppler, Big Bang, Space tools)

Which galaxy is moving towards Earth? Explain.

• A because It is redshifted

• B because It is redshifted.

• C because It is blue shifted.

• They all show red shift, so they are not moving towards Earth.

Based on the spectrums in the figure,  rank the galaxies in order of the speed with which they are moving away from Earth, from slowest (1) to fastest (3).

• C, A, B
• A, B, C
• B, A, C
• A, C, B

Evidence suggests that the whole Universe is expanding and that it might have started billions of years ago from one place with the big bang.

• True
• False

If an object is moving toward us, its spectrum will experience

• no shift
• red shift
• black spectrum
• blue shift

Hubble observed that all galaxies and stars are

• expanding

• moving away from us

• moving towards us

• standing still

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

• most galaxies are red-shifted

• emission spectrums show that stars are moving away from us

• the universe is gaining matter

• the universe is expanding

What do the initial moments after the Big Bang have in common with the universe as it exists now? 

• all the stars, galaxies, and planets that exist today were formed just a few moments after the Big Bang
• The universe back then could not sustain life, and it cannot sustain life now
• the universe was extremely hot then, and it is still extremely hot not
• the universe began expanding then, and it is still expanding today

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

About how long ago do scientists believe the universe began?

• 13-14 billion years ago
• 13-14 million years ago
• 12-13 billion years ago
• 12-13 million years ago

In red shift, the wavelengths of light become

• Bluer
• shorter
• longer