Lesson 1.2

Question 1

another view that proposes that the
universe has always been expanding

As the universe expands, new stars and galaxies are formed at the
same rate that old ones become unobservable due to distance and
recession velocity.

Despite the continuous expansion, the average density of the universe
remains the same; hence, the name steady. state.

Answer 1

steady state theory

Question 2

Despite the continuous expansion, the average _ of the universe
remains the same; hence, the name steady. state.

Answer 2

density

Question 3

universe according to steady state theory

Answer 3

no beginning, no end
always been here. always be present
always looks the same in any time and space
creates new matter as it continously expands

Question 4

Proponents of the Steady State Theory

Answer 4

Hermann Bondi
Thomas Gold
Fred Hoyle

Question 5

drawbacks of Steady State Theory

Answer 5

not parallel with the law of conservation of energy and mass

discovery of CMB radiation signigicantly supported the explanations of big bang theory and led many scientists to reject the steady state theory in 1965

recent findings rejects the idea cosmic radiation was a result of a supernova

proven that radiation is equal in any direction of the universe and could not have resulted from supernova

Question 6

proposes that the universe is expanding and will contract once all the
energy after the big bang has been used up.

Then, it will expand again once it approaches the point of
singularity.

Answer 6

Oscillating Universe theory, also known as pulsating theory,

Question 7

The oscillating universe is a combination
of _ and big bang.

Answer 7

big crunch

Question 8

_ occurs when the universe
expands and eventually reverses, then
collapses causing the formation of a
singularity.

Singularity result to a big bang and the
birth of a new universe.

Answer 8

Big crunch

Question 9

Proponent of Oscillating
Universe Theory

Answer 9

Richard Tolman

Question 10

Tolman called the birth of another
universe as the

Answer 10

big bounce

Question 11

Drawbacks of the Oscillating Universe Theory

Answer 11

suggestion that the universe would collapse on its own after it reached its full expansion violates some current laws of physics, such as the postulated existence of dark energy

currently postulated end of the universe is by big freeze or heat death