Lesson 1.1

Question 2

is cosmological model that explains how the
universe began

suggests that the universe started its expansion about 13.8
billion years ago

concept of big bang as not a literal explosion of something
leading to the creation of the universe,
but rather a sudden expansion

Answer 2

big bang theory

Question 3

big bang theory suggests that the universe started its expansion about _
billion years ago

Answer 3

13.8

Question 4

Big Bang Theory and the Bread-Raisin Model

The bread represents the
_; while raisins are
_.

Answer 4

universe, galaxies

Question 5

Big Bang Theory and the Bread-Raisin Model

The bread represents the
universe; while raisins are
galaxies.

The galaxies, represented
by dots, are not _.

Answer 5

expanding

Question 6

Distances in relation to other galaxies just increases because of the
_ universe.

Answer 6

expanding

Question 7

an area predicted
to be in the core of a black hole
with very high temperature and
density

Answer 7

“​singularity​”

Question 7

an area predicted
to be in the core of a black hole
with very high temperature and
density

The intense heat resulted to
formation of matter and antimatter
particles that were destroyed every
time they collided with each other

Answer 7

“​singularity​”

Question 8

is the
formation of elements, such as
H and He

Answer 8

Nucleosynthesis​

Question 9

Presence of these elements led
to the formation of stars and
galaxies.

Answer 9

H and He

Question 10

proton, neutron=deuterium
deuterium, neutron=tritium
tritium, proton=helium

Question 11

expansion of the universe- is supported by the observation that
galaxies are receding from us.

high amount of light elements like H, He and Li- These elements were formed through the fusion of protons and neutrons immediately after the Big Bang

detection of the cosmic microwave background (CMB)
radiation- the residue or heat leftover from the Big Bang.

Question 12

the residue or heat leftover from the Big Bang

Answer 12

cosmic microwave background (CMB)
radiation

Question 13

Evidences that Support the Big Bang Theory

Answer 13

the observation that
galaxies are receding from us

high amount of light elements like H, He and Li.

cosmic microwave background (CMB)
radiation

Question 14

Proponents of the Big Bang Theory

Answer 14

Georges Henri Joseph Edouard Lemaître

Edwin Powell Hubble

Arno Penzias
Robert Wilson

Question 15

was the first proponent of
the big bang theory. He suggested the idea of
the expanding universe

Answer 15

Georges Henri Joseph Edouard Lemaître

Question 16

who established
the ​=’s law ​which provided an
evidence that the universe was not static
but expanding.

Answer 16

Edwin Powell Hubble

Question 17

​which provided an
evidence that the universe was not static
but expanding

Answer 17

​Hubble’s law

Question 18

discovered that microwaves with
wavelengths of about 7
centimeters were present in space

These waves were referred to as
the cosmic microwave background
(CMB) radiation.

Answer 18

Arno Penzias and Robert Wilson

Question 19

microwaves with
wavelengths of about 7
centimeters were present in space

Answer 19

cosmic microwave background
(CMB) radiation.

Question 20

Drawbacks of the Big Bang Theory

Answer 20

failed to explain how the universe was created
only explains how it evolves and not where it originated
failed to explain how galaxies formed

Question 21

states that the relationship of the velocities
of distant objects in the universe is directly proportional
to their distance from Earth.

Answer 21

Hubble’s law