THE UNIVERSE AND CHAPTER 1

Question 0

What are the types of galaxies?

Answer 0

Spiral
Barred spiral
Elliptical
Irregular

Question 1

a unit of astronomical distance equivalent to the distance that light travels in one year

Answer 1

Light year

Question 2

Large cloud of gas and dust

Answer 2

Star

Question 3

What did Edwin Hubble discover?

Answer 3

The andromeda galaxy

Used a turning fork diagram distance of galaxies is redshift

Question 4

What is the Doppler effect?

Answer 4

Takes place when a source of waves moves with respect to an observer or listener

Question 5

Big Bang theory

Answer 5

The universe the universe expanded and cooled using four forces

Gravity
Electromagnetism
Strong and weak nuclear forces

Question 6

How did stars begin?

Answer 6

They begin as large clouds of gas and dust “nebula”

Question 7

Different stars

Answer 7

Low mass
Medium mass- red giant
High mass

Question 8

What elements make a star?

Answer 8

Hydrogen converted to helium

Question 9

Spiral galaxy

Answer 9

Disc component, bulge, halo

Classified by tightness of spiral arms and size of bulge

Question 10

Elliptical galaxy

Answer 10

No disk

Classified by size of nucleus or flatness

Question 11

Irregular galaxy

Answer 11

Neither spiral nor elliptical

Question 12

Dog has 4 brown legs

Answer 12

4: quantitative
Brown: qualitative

Question 13

Logical interpretation based on what scientists already know

Answer 13

Inference

Question 14

Characteristics of a scientist

Answer 14

Curious
Skeptical
Open minded
Creative

Question 15

Steps of scientific method

Answer 15

Observe/ask questions
Make inferences/ form hypothesis 
Conduct controlled experiments
Collect and analyze data 
Draw conclusions

Question 16

What makes a good experiment

Answer 16

Only one variable is changed while all others remain unchanged