Lesson 1 Flashcards
the formation of the universe began through the explosion of a primordial atom which happened 13 billion years ago.
the Big Bang
theory that also explains the continuous expansion of the universe
Big Bang Theory
protons and neutrons combined together and formed light elements
Hydrogen and Helium
protons and neutrons combined together and formed light elements Hydrogen and Helium in the process of
Big Bang Nucleosynthesis
means star
stellar
the formation of elements in the center of the star is called
stellar nucleosynthesis
said that “We are made of star stuff.”
Carl Sagan
A process by which average star gets their energy and convert hydrogen into helium
proton-proton chain reaction
proton and neutron fused together to form
Deuterium
one proton collides with deuterium ___ is formed
Helium-3
Two helium-3 collided will form
Helium-4
Case is different in massive star or star eight times larger than solar mass. They undergo ____ to convert Hydrogen to Helium
CNO ( Carbon, Nitrogen, Oxygen) Cycle
Happens in red giant star once they leave the stage of main sequence star. This is how three Helium-4 are converted into Carbon
Tri Alpha Process
A star accumulates more mass and continue to grow into
red super gaint
Alpha Particle fusion happens at its core and creates more heavy elements until iron
Alpha ladder process
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
S-process or slow process
means that there is a faster rate of capturing neutrons before it undergoes radioactive decay thus, more neutrons can be combined at the nucleus. This is what happens in a supernova forming heavier elements than Iron with process known as supernova nucleosynthesis
R-process or rapid process
supernova forming heavier elements than Iron with process known as
supernova nucleosynthesis
star shine because of
Nuclear Fushion
a process that occurs in their cores where hydrogen atoms are fused together to create helium
Nuclear Fusion
Hydrogen atoms collides and fuse together in the core of a star, creating helium and releasing a large amount of energy.
Nuclear Fusion
The energy released from nuclear fusion heats the star’s gas
Heat
The charged particles in the star collide with each other, creating an electric field that shakes and produces light.
Light
