31.3 & 31.4

Question 1

Galaxy

Answer 1

Large group of stars, dust, and gas held together by gravity

Question 2

Milky Way

Answer 2

Large galaxy our solar system is in it

Question 3

Local Group

Answer 3

Large group of galaxies that includes the Milky Way

Question 4

Cosmology

Answer 4

The study of how the universe began, how it changes/continues to change, and what it’s made up of

Question 5

Big Bang Theory

Answer 5

All matter and energy in the universe were compressed into a single point that began to expand outward

Question 6

Cosmic Background Radiation

Answer 6

The residual microwave radiation from the formation of the universe

Question 7

Dark Matter

Answer 7

An invisible form of matter that does not emit any detectable electromagnetic energy of its own

Question 8

Dark Energy

Answer 8

An invisible form of energy that creates repulsive force causing the universe to expand at a faster rate

Question 9

What are the three shapes a galaxy could be?

Answer 9

Spiral, Elliptical, Irregular

Question 10

Which galaxy is our solar system located in?

Answer 10

Milky Way

Question 11

What shape is the Milky Way galaxy?

Answer 11

Spiral

Question 12

How many galaxies are in the Local Group?

Answer 12

50

Question 13

What are the two largest galaxies in the Local Group?

Answer 13

Andromeda, Milky Way

Question 14

Where are we located in the Milky Way galaxy?

Answer 14

The center of one of the arms

Question 15

How long ago did the Big Bang happen?

Answer 15

13.7 billion years ago

Question 16

What does the Doppler Effect do?

Answer 16

Shifts occur in light as well as sound

Question 17

What is the universe made of?

Answer 17

Regular matter, and Dark matter