Lectures

Question 1

The formation of elements in the center of the star.

Answer 1

Stellar Nucleosynthesis

Question 1

The formation of the universe began through the explosion of a primordial atom.

Answer 1

The Big Bang Theory

Question 2

“We are made of star stuff.”

Answer 2

Carl Sagan

Question 3

The star is unable to generate heat when it runs out of hydrogen in its core leading to its contraction and expansion. It cools down and glows red. The Helium fused into Carbon.

Answer 3

Red Giant

Question 4

Red giant star becomes exhausted of nuclear fuel, the outer material is blown off into space leaving the inert Carbon. The remnant is known as…?

Answer 4

White Dwarf

Question 5

Giant cloud of gas and dust.

Answer 5

Nebula

Question 6

It is formed from nebula due to the gravity that pulled Hydrogen gas together until it spins faster and faster and becomes ignited.

Answer 6

A protostar

Question 7

It starts to form when nuclear fusion occurs at the core of the star, it begins to contract, glow and become stable. Hydrogen is converted into Helium.

Answer 7

Main Sequence Star

Question 8

This is said to be the remain of the white dwarf that cooled down and no longer emits light and heat.

Answer 8

Black Dwarf

Question 9

It is formed from supernova explosion. This is also the smallest star.

Answer 9

Neutron Star

Question 10

Explosion of star; it releases large amount of energy. Because of that, elements are dispersed into the space.

Answer 10

Supernova

Question 11

It is a region in space where gravity is too strong that no matter can escape from it.

Answer 11

Black Hole

Question 12

A more massive main sequence star evolves, cools and expands faster than low mass star; the largest known star. Carbon fusion still occurs and Oxygen formed.

Answer 12

Red Super Giant

Question 13

What element from space is pulled by gravity and turn into a protostar?

Answer 13

Hydrogen

Question 14

What will happen if a low massive main sequence star runs out of hydrogen fuel?

Answer 14

The star becomes a Red Giant or a Red Super Giant

Question 15

How are heavy elements such as Carbon, Oxygen and Neon formed during star formation?

Answer 15

Via the alpha process

Question 16

Why is it impossible for any matter such as light and radiation to escape from a black hole?

Answer 16

For it creates a gravitational pull so strong.

Question 17

Why do you think massive star has shorter life span than average star?

Answer 17

They burn through all of the elements that fuel their life cycle faster.

Question 18

The process by which average stars get their energy and convert Hydrogen into Helium.

Answer 18

Proton-proton Chain Reaction

Question 19

A process taken by stars eight times larger than our solar system.

Answer 19

Carbon, Nitrogen, Oxygen Cycle

Question 20

This process happens in red giant star once they leave the stage of main sequence star.

Answer 20

Tri-alpha Process

Question 21

This is how the two primary isotopes of He is converted into Carbon.

Answer 21

Tri-alpha Process

Question 22

A star accumulates more mass and continues to grow into red super giant. Alpha particle fusion happens at its core and creates more heavy elements.

Answer 22

Alpha Ladder Process

Question 23

It is added to a seed nucleus.

Answer 23

Neutron Capture

Question 24

It happens when there is a slow rate of capturing neutron while there is a faster rate of radioactive decay hence increasing the proton by 1.

Answer 24

S-process or Slow Process

Question 25

It means that there is a faster rate of capturing neutron before it undergoes radioactive decay thus, more neutrons can combined in the nucleus. This is what happens in a supernova forming heavier elements than Fe.

Answer 25

R-process or Rapid Process

Question 26

Formation of heavier elements than Fe.

Answer 26

Supernova Nucleosynthesis