Chapter 1

Question 1

suggested that if the
universewere expanding, it
would imply that it had a
definite beginning in what
he called the “primeval
atom” or what we now
refer to as the Big Bang.

Answer 1

G E O R G E S L E M A Î T R E

Question 2

The original term for the big bang?

Answer 2

Primeval atom

Question 3

What are the Four fundamental forces of
nature (superforce) as a
single, unified force

Answer 3

gravity
- Strong Nuclear
- Weak nuclear
- electromagnetic

Question 4

Planck Epoch

Answer 4

(0-10−34s , 1040K)
Four fundamental forces of
nature (superforce) as a
single, unified force

Question 5

This is where the gravity separated from the unified force

Answer 5

Grand Unified Epoch
(10−34 s , 1036K)

Question 6

What is included in the grand unified theory

Answer 6

Grand Unified Theory
- strong Nuclear
- weak nuclear
- electromagnetic

Question 7

List all the events of the radiation era

Answer 7

1. Planck Epoch
2. Grand Unified Epoch
3. Inflationary Epoch
4. Electroweak Epoch
5. Quark Epoch
6. Hadron Epoch
7. Lepton Epoch
8. Nuclear Epoch

Question 8

rapid expansion of the
universe
- Electrons, quarks and other
particles

Answer 8

Inflationary Epoch
(10−36 s , 1033K)

Question 9

Electroweak Epoch

Answer 9

(10−32 s , 1020K)
Forces of nature
- Weak nuclear
- Electromagnetic
- Gravity
- Strong nuclear

Question 10

All ingredients for universe is
present

Answer 10

Quark Epoch
(10−12 s , 1016K)

Question 11

Hadron Epoch

Answer 11

(10−6
s , 1010K)
Temperature cooled down,
enough to form neutron and
proton

Question 12

Protons and neurons fused to
create nuclei, creating the first
stable element He

Answer 12

LeptonEpoch
(1s , 1012K)

Nuclear Epoch
(100s , 109K)

Question 13

List all that belongs in the matter era

Answer 13

Atomic Epoch
Galactic Epoch
StellarEpoch