Lesson 2

Question 1

First Electron Quark and Antiquark

Answer 1

Inflation epoch

Question 2

First protons and neutrobs

Answer 2

Hadron epoch

Question 3

First nucleons of hydrogen, helium, and lithium

Answer 3

Nuclear Epoch

Question 4

First elements were former (Hydrogen, Helium, Lithium)

Answer 4

Recombination Epoch

Question 5

Gases and dust began to accumulate

Answer 5

Galactic Epoch

Question 6

Star & Galaxies formed

Answer 6

Stellar Epoch

Question 7

The cosmic furnaces of the universe, they form the heavier elements

Answer 7

Stars

Question 8

The process by which elements are created within stars by combining protons and neutrons rogether from the nuclei of lighter element

Answer 8

Stellar Nucleosynthwsis

Question 9

The process by which multiple nuclei join to form heavier nuclei

Answer 9

Nuclear fusion

Question 10

Main Branch Proton Proton Chain (3 Steps)

Answer 10

1. 2 protons fuse to make a deuterium nucleus (1 proton 1 neutron)
2. D. nucleus and protn fuse to make a nucleus of helium 3 (2 protons 1 neutron)
3. 2 helium-3 nuclei fuse to form helium-4 (2 protons 2 neutrons)

Question 11

Alpha process

Answer 11

1. 2 heloum atoms combine ro fotm beryllium atom (4 proton 4 neutron)
2. Beryllium atom combines with 1 helium arom to form carbon (6 proton 6 neutron)

Question 12

Life Cycle of Star

Answer 12

1. nebula
2. Protostar
3. main seq star
4. red giant star
5. red super giant
6. supernova