CRCT QUESTIONAccording to the big bang theory, the universe is about

A. 470 billion years old.B. 500 billion years old.C. 4.7 billion years old.D. 13.7 billion years old.

LAST UNIT OF THE YEAR!!!!!

Ready, Set, GO

Prove that the following wff is valid by means of resolution:

xp(x)v xq(x)xp(x)vq(x)Why can’t you do this problem?

You cannot do these problems because you do not know the math between what you now know and what you would need to know to do the problem!

You will have the same problem with understanding the process that scientists call the big bang.

Just because you cannot understand some of what scientists say about the big bang does not mean that scientists do not understand it clearly!They know the science between what you know and what is needed to be known to understand the big bang!

Did the detectives see the explosion?No! They have to figure it out from evidence!

They take evidence from space to figure out the

science!

c. Some sort of “event” occurred to cause the change that formed the universe we have today.

d. This event is what scientists call the

e. Instead, it was theexpansion of space and time itself, and thereforeoccurred everywhereat the same time.

f. Any galaxies fartherthan ~ 13.7 billion ly away we cannot see!

Why: because the light hasn’t had time to get here!!!

Are there galaxies beyond what we can

see?

Astronomers think that answer is

yes. We just can’t see them.

1. is the evidence for this expansion.

a. Universal red shift

Sound shows Doppler effect too! Clip on this picture to experience the Doppler effect.

RED SHIFT

What you just heard was the Doppler effect with sound. Red shift is the Doppler effect with light.

Notice that the line groupings are the same – only shifted red.

3. From our position in the universe, it looks like we are the center because everything appears to be moving away from us.

As a balloon gets larger every point moves away from every other point.

Ex: If your galaxy was a raisin, notice that every raisin is moving away from every other raisin. In fact, a raisin far away from you is moving away faster than those that are closer. Our expanding universe acts the same way.

b. The second evidence is

Cosmic MicrowaveBackground Radiation!

1. This is energy “leftover” from theBig Bang.

2. -discovered in theearly 1960’s.

Ex. This is like an oven that was used to make cookies. The cookies are not visible but the smell is there (evidence) and when you open the oven door there is just a little bit of heat still there (another piece of evidence).

What are the two pieces of evidence that

support the Big Bang Theory that we

discussed?

Video clip of the big bang

TICKET OUT THE DOOR

On a post-it, write down 1

question you still have about the

Big Bang Theory or 1 fun fact you learned today!!!