4. State the Big Bang Theory.
5. Investigate the evidence that led to the prediction and discovery of the expansion of the universe by Hubble and Friedman.
6. Describe the Steady State theory for the origin of the universe, and explain why it was replaced.
Changing ideas: explore the change to the origin model as new evidence became available, re Gamow vs Hoyle:
read the 1955 article Origin of everything: hot bang or ageless universe? and then
what are the main ideas of the two theories presented?
2. read the 1965 article Murmur of a Bang
What is the ‘new’ evidence?
How did the theory change in the ten years between the two articles?
read Barbara Gamow’s poetic response to Ryle vs Hoyle
Commentary on Ryle versus Hoyle by Barbara Gamow, George Gamow's wife:
"Your years of toil," said Ryle to Hoyle,
"Are wasted years, believe me.
The steady state is out of date.
Unless my eyes deceive me,
My telescope has dashed your hope;
Your tenets are refuted.
Let me be terse: our universe
Grows daily more diluted!"
Said Hoyle, "You quote Lemaître, I note,
And Gamow. Well, forget them!
That errant gang and their Big Bang—
Why aid them and abet them?
You see, my friend, it has no end
And there was no beginning,
As Bondi, Gold, and I will hold
Until our hair is thinning!"
"Not so!" cried Ryle with rising bile
And straining at the tether;
"Far galaxies are, as one sees,
More tightly packed together!"
"You make me boil!" exploded Hoyle,
His statement rearranging;
"New matter's born each night and morn.
The picture is unchanging!"
"Come off it, Hoyle! I aim to foil
you yet" (The fun commences)
"And in a while," continued Ryle,
"I'll bring you to your senses!"
Note: Lemaitre was a Belgian astronomer and cosmologist who formulated the big-bang theory; he held that the universe began in a cataclysmic explosion of a small, primeval “super-atom.”
3. complete Worksheet The Big Bang Theory from Universe PPT Digital Notebook Ext
Revision
View videos:
LIT: consider the contribution of female scientist Cecelia Payne in our understanding of the composition of the universe, Cecilia Payne Composition of the Universe
3. complete Life and Death of Stars (p30 on) from Universe PPT Digital Notebook Ext
View videos:
o Sam Neill Star Stuff Part 1 (continuous play to Part 2) [9.59]
o Sam Neill Star Stuff Part 2 [10.01]
Identify the colour of the following stars:
a Bellatrix, surface temperature 22 000°C
b Rigel, surface temperature 12 000°C
c Canopus, surface temperature 7100°C
d Pollux, surface temperature 4200°C
e Betelgeuse, surface temperature 3400°C
LESSON TO PHYSICAL SCIENCE TEST
REVISION LESSON 3
More Revision Resources at https://connect.roseville.nsw.edu.au/courses/23081/pages/revision-resources