Stars (life and death)

Question 1

What is the shell or edge of a black hole where light can no longer escape?

Answer 1

Event Horizon

Question 2

What may have formed the early universe?

Answer 2

Primordial black holes

Question 3

What is the spinning neutron star?

Answer 3

Pulsar

Question 4

What is the type of star formed when massive stars explode their remnant cores become highly compressed clumps of neutrons?

Answer 4

Neutron stars

Question 5

What is a high mass of star dies violently by blowing themselves apart in these explosions?

Answer 5

Supernova

Question 6

What is it when the helium core of a “dying” star begins to rapidly fuse and forms carbon and oxygen?

Answer 6

Helium Flash

Question 7

What does the burned out core of a low mass star become?

Answer 7

White Dwarf

Question 8

What are the type of explosions of low mass stars before they expand into a planetary nedula?

Answer 8

Nova

Question 9

What is the dust and gas that stars are formed out of?

Answer 9

Nebula

Question 10

What is it called when hydrogen atoms collide together to form helium and a huge amount of energy?

Answer 10

Nuclear fussion

Question 11

What is the chart that was created by Hertzsprung and Russell and was used to categorize stars by their size and brightness?

Answer 11

H.R. diagram

Question 12

What is the balance between the force of gravity pushing the star in and the energy from the fusion pushing out?

Answer 12

Hydrostatic equilibrium

Question 13

What produces energy from stars?

a. Super nova explosions
b. Nuclear fission
c. Nuclear fusion

Answer 13

c. Nuclear fusion

Question 14

What is the importance of star color?

a. Tells us about the mass
b. Tells us about the temperature of the star
c. Tells us about the age

Answer 14

b. Tells us about the temperature of the star

Question 15

What is the color of the hottest star?

a. Blue
b. Red
c. Green

Answer 15

a. Blue

Question 16

What color is the coolest stars?

a. Blue
b. Red
c. Green

Answer 16

b. Red

Question 17

Where are main sequence stars located on the HR diagram?

a. Upper right corner
b. Lower left corner
c. Upper left to lower right

Answer 17

c. Upper left to lower right

Question 18

Where are the giant and super giant stars located on the HR diagram?

a. Upper right corner
b. Lower left corner
c. Upper left to lower right

Answer 18

a. Upper right corner

Question 19

Where are the tiny white dwarfs are found in the HR diagram?

a. Upper right corner
b. Lower left corner
c. Upper left to lower right

Answer 19

b. Lower left corner

Question 20

What cycle do stars spend most of their time in?

a. White dwarf
b. Main sequence
c. Supergiant

Answer 20

b. Main sequence

Question 21

How do main sequence stars get their energy?

a. Helium fusion
b. Hydrogen fission
c. Helium fission

Answer 21

b. Hydrogen fission

Question 22

How does mass affect the rate at which main sequence stars move through their life cycle?

a. More massive the faster
b. More massive the slower
c. Smaller the faster

Answer 22

a. More massive the faster

Question 23

What happens when hydrogen fusion ceases?

a. Gravity compresses the core
b. Expansion into a giant
c. Helium begins nuclear fusion
d. All of the above

Answer 23

d. All of the above

Question 24

How long can you see the remains of a supernova explosion?

a. Thousands of years
b. Millions of years
c. Hundreds of years

Answer 24

b. Millions

Question 25

What can a supernova explosion in a cold dark nebula trigger? a. Birth of new stars b. Destruction of other stars c. Formation of moons

Answer 25

a. Birth of new stars

Question 26

The balance between the force of gravity pushing in on a star and the force of fusion pushing out on a star keep the star stable - - What is this called? a. standard candle b. black hole c. hydrostatic equilibrium

Answer 26

c. Hydrostatic equilibrium

Question 27

How long will the remains of a supernova explosion last? a. Millions of years b. about 100 years c. a few years

Answer 27

a. Millions of years

Question 28

What did radio waves emitted by pulsars lead scientists to believe at one time? a. The end of the world is coming b. The radio signals were from aliens c. The Pulsars were moving toward earth

Answer 28

b. The radio signals were from aliens

Question 29

How does moving at faster speeds affect time? a. Slows it down b. Has no affect c. Speeds it up

Answer 29

a. Slows it down

Question 30

How is the mass of an object moving at the speed of light affected? a. mass is not affected b. It becomes less massive c. It becomes infinitely massive

Answer 30

c. It becomes infinitely massive

Question 31

How does mass affect space time? a. It creates light b. It warps pace time resulting in the bending of light c. all of the above

Answer 31

b. It warps pace time resulting in the bending of light

Question 32

If you apply General Readlitivity to a collapsing core of a star we find out that it's gravity . . a. releases light b. can trap light c. decrease Mass d. unchanged

Answer 32

b. can trap light

Question 33

``` Be able to label the HR diagram with the following locations: Giants White Dwarfs Main Sequence Stars Super giants ```

Answer 33

See Mrs. Krumpelman if need help

Question 34

What are the three properties of a black hole?

Answer 34

1) . Electrical charge 2) . Mass 3) . Angular momentum