Chapter 11.1

Question 0

Interstellar matter

Answer 0

Made up of gas (mostly hydrogen) and dust

Question 1

Star

Answer 1

Object made of hot gases with a core like a thermonuclear reactor

Question 2

Low mass star

Answer 2

Small, dim, cool red dwarf
Burn slowly
Last 100 million years

Question 3

Intermediate mass stars

Answer 3

Burn faster than low mass stars

Live 10 billion years

At the end becomes red giant then white dwarf then black dwarf

Question 4

High mass stars

Answer 4

Burn fast and die in only 7 billion years

Die as a supernova which can then become a black hole or a neutron star

Question 5

Supernova

Answer 5

Explosion which happens when a high mass star dies

Spreads heavy elements through space

Question 6

Black hole

Answer 6

Happens when supernova collapses in on itself

High density with an extraordinary amount of gravity. Not even light escapes!

Question 7

Neutron star

Answer 7

Supernova collapses but doesn’t have enough mass to become a black hole

Cores are very very hot and can take trillions of years to cool

Question 8

Luminosity

Answer 8

How bright something is

Determined by the amount of energy given off

Question 9

Hertzsprung-Russell diagram

Answer 9

Shows the relationship between luminosity and temperature/colour

Question 10

Doppler effect

Answer 10

Change in wavelength because of motion