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Question 1

Star with masses between 0.5-8 solar masses at birth end up as:

Answer 1

white dwarfs

Question 2

Stars with masses between 8-20 solar masses at birth end up as

Answer 2

Super nova and neutro stars

Question 3

Stars with masses above 20 solar masses at birth end up as

Answer 3

Black holes

Question 4

Describe the proton, proton chain what elements are involved?

Answer 4

Occurs under high temp and pressure in the core of a low mass star. Begins when the star is on main sequence. Converts hydrogen into helium and it is the primary process by which low mass stars make energy

Question 5

What is the most abundant element from which stars are made

Answer 5

Hydrogen

Question 6

How is the chemical composition of the suns core different now from what it was 4 million years ago

Answer 6

As the sun gets older, the core in accumulates more helium. It has less hydrogen to burn

Question 7

Describe Hydrostatic equilibrium

Answer 7

 Internal pressure of the core supporting the sun against the intense inward pull of gravity

Question 8

In the process of nuclear fusion, some of the mass is converted into

Answer 8

Energy

Question 9

In the sun, how much mass is converted to energy each second

Answer 9

4 million metric tons of mass

Question 10

How old will the sun be when he leaves the main sequence?

Answer 10

10 billion years

Question 11

When does sun gets old and leaves the main sequence

Answer 11

The sun gets larger, surface gets redder and cooler, luminosity decreases and the core fills more with helium

Question 12

How long does hydrogen burning last in the sun ? how long will helium burning last in the sun?

Answer 12

Hydrogen-10 billion years. Helium-100milliom years

Question 13

When helium finally begins to fuse in the sun, what is a produce?

Answer 13

Carbon and oxygen

Question 14

As the core of a low mass star ages it gets hotter but the outer envelope of the star expands and reddens. The star becomes a..

Answer 14

Red giant

Question 15

What is the planetary nebula? How do they form?

Answer 15

The expanding ring of gas. It occurs when the outer layers of a star are gradually blown away by the hot core

Question 16

What is a white dwarf

Answer 16

A hot carbon oxygen core of a dead star

Question 17

Order of a star from early to late

Answer 17

Prostar, main sequence, red giant, planetary nebula, white dwarf

Question 18

Which star lives the longest

Answer 18

1/10 mass. Stars with the lowest mass live the longest

Question 19

Why do high mass stats have such short lives compared to low mass stars

Answer 19

Faster fusion rate due to higher gravitational pressure

Question 20

What is meant by onion skin shells of a high mass star

Answer 20

The layers of different elements undergoing nuclear fusion in stars

Question 21

What element produced in the core of a massive star marks the end of the line ?when the star begins producing the element how long does it have to live?

Answer 21

Iron. Days

Question 22

Where do heavy elements come from and basically have a made

Answer 22

Created in supernova explosions. during this explosions extreme conditions, generate high temperatures and pressures allowing for rapid nuclear reactions that produce heavy elements

Question 23

In a high mass star, if the core is less than three solar masses. It will collapse and become..

Answer 23

Neutron star

Question 24

In a high mass star, if the core is more than three solar masses. It will collapse and become..

Answer 24

Black hole

Question 25

What is a pulsar

Answer 25

Periodic flashes of radio energy as the neutro star spins

Question 26

What are the three possibilities of what star leaves behind when it dies

Answer 26

White dwarfs, Neutron Stars, Black hole

Question 27

What is singularity

Answer 27

The neutron star is instantly crushed down to an object that is smaller than a proton. A single thing with infinite density

Question 28

What is the event horizon

Answer 28

Boundary surrounding a black hole beyond wish nothing not even like an escape it’s gravitational pull unless going through speed of light

Question 29

Schwarschikd radius

Answer 29

The distance from the center of the black hole in which the escape velocity equals the speed of light

Question 30

What is meant by the point of no return for a black hole

Answer 30

 You would have to travel at  the speed grader than light to escape  and since nothing can travel faster than the speed of light, nothing escape from location

Question 31

When star start doing this, they enter the main sequence

Answer 31

What starts began undergoing nuclear function in their cores

Question 32

What object, resides, deep in the core of milky way galaxy and nearly all spiral galaxies

Answer 32

Supermassive black hole