Unit 5- Space

Question 1

3 types of galaxies

Answer 1

Spiral, elliptical, irregular

Question 2

Milky way is a ….. galaxy

Answer 2

Spiral

Question 3

Name of our galaxy

Answer 3

Milky Way

Question 4

Stage of life a star spends the most time in

Answer 4

Main Sequence

Question 5

Stage the sun is currently in

Answer 5

Main Sequence

Question 6

An explosion in which stars tear apart releasing energy and elements

Answer 6

Supernova

Question 7

Cloud of gas and dust where stars are born

Answer 7

nebula

Question 8

Stage of stellar evolution low mass stars are in when only a hot core is left behind

Answer 8

White Dwarf

Question 9

Most common type of star

Answer 9

main sequence

Question 10

Age of sun

Answer 10

5 billion years

Question 11

Age of universe

Answer 11

13.7-14 billion years

Question 12

Which scientist discovered that distant galaxies are moving away from us?

Answer 12

Hubble

Question 13

Most common element in universe

Answer 13

Hydrogen

Question 14

Most accepted theory of how universe forms

Answer 14

Big Bang Theory

Question 15

2 options of what happens to a massive star after a supernova

Answer 15

black hole OR neutron star

Question 16

Equilibrium

Answer 16

balance of internal gravity and external pressure

Question 17

What does the HR diagram tell us about stars?

Answer 17

temp & luminosity

Question 18

Hottest stars on HR diagram appear…

Answer 18

blue

Question 19

Coolest stars on HR diagram appear….

Answer 19

Red

Question 20

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

Answer 20

galaxy