14 Stellar Evolution

Question 1

All stars emit

Answer 1

Visible light

Question 2

More blue the star

Answer 2

The hotter it is

Question 3

> 33000 colour

Answer 3

Blue

Question 4

10,000 - 33,000 colour

Answer 4

Blue white

Question 5

7,500 - 10,000 colour

Answer 5

White

Question 6

6000 - 7500 colour

Answer 6

Yellow white

Question 7

53000 - 6000 colour

Answer 7

Yellow

Question 8

3700-5200 colour

Answer 8

Light orange

Question 9

<3700 colour

Answer 9

Red

Question 10

Where does evolution of stars start

Answer 10

Nebula

Question 11

Low mass path <8 M

Answer 11

Nebula -> main sequence -> red giant -> white dwarf -> nebula

Question 12

High mass path >8M

Answer 12

Nebula -> main sequence -> red super giant -> supernova
-> black hole -> nebula
-> neutron star -> nebula

Question 13

For a star to remain stable

Answer 13

Thermal expansion (gas and radiation pressure) = weight

Question 14

For a star to expand (main sequence to red giant)

Answer 14

Thermal expansion > weight

Question 15

For a star to contract (red giant to white dwarf)

Answer 15

Thermal expansion < weight

Question 16

Absolute magnitude

Answer 16

Measure of brightness of start at standard distance (32.6 light years)

Question 17

Absolute magnitude scale is reversed

Answer 17

5 = very dim
1 = dim
-1 = bright
-5 = very bright

Question 18

Graph to classify stars

Answer 18

X axis = temp of colour
Y axis = absolute magnitude

Top right - red giant
Bottom left - white dwarfs
Middle - main sequence