chapter 31 section 3 and 4

Question 1

galaxy

Answer 1

large group of stars dust and gas held together by grvity

Question 2

milky way

Answer 2

the sun is part of a larger group of stars dust and gas

Question 3

local group

Answer 3

includes 50 galaxies spread out over a distance of 10 million light years

Question 4

cosmology

Answer 4

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

Question 5

big bang theory

Answer 5

how the universe was formed

Question 6

cosmic background radiation

Answer 6

residual microwave radiation emitted when the universe was very young

Question 7

dark matter

Answer 7

is 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 a repulsive force causing the universe to expand at a faster rate

Question 9

what shape is the milky way galaxy

Answer 9

spiral

Question 10

how many galaxies are found in the locall group

Answer 10

50

Question 11

what are the two largest galaxies

Answer 11

milky way and andrometa

Question 12

how long ago did the big bang theory happen

Answer 12

13.7 billion years ago

Question 13

what colors are the wave length

Answer 13

red and blue

Question 14

what is the universe made of

Answer 14

regular matter and dark matter