31.3 and 31.4

Question 1

large group of stars, dust, and gas held together by gravity.

Answer 1

galaxies

Question 2

part of a larger group of stars,

Answer 2

Milky Way

Question 3

a large group of stars

Answer 3

local group

Question 4

study of how the universe began, how it continues to change and what it is made up

Answer 4

cosmology

Question 5

all matter and energy in the universe

Answer 5

big band theory

Question 6

residual microwave radiation emitted when the universe was very young

Answer 6

cosmic background radiation

Question 7

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

Answer 7

dark matter

Question 8

creates a repulsive form of energy

Answer 8

dark energy

Question 9

What are the three shapes a galaxy can be?

Answer 9

spiral, elliptical and irregular

Question 10

Which galaxy are 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

Milky Way and Androneda

Question 14

Where are we at in the Milky way galaxy?

Answer 14

In the center

Question 15

How long ago did the big bang accure?

Answer 15

14.7 billion years ago

Question 16

What is the name of the affect that shows the difference in lights?

Answer 16

Doppler

Question 17

What is the universe made up of?

Answer 17

regular matter, dark matter