The Big Bang ModelThe most widely accepted theory TODAY on the formation of the universe …Subject to change!

Make a foldable1. Take 3 sheets of

computer paper.2. Stagger them, then

fold over to create a foldable with flaps.

3. Staple at the top.4. Make a title- Space5. Include your name

on the front!

Label your Tabs

From the TOP…•TITLE PAGE

•What the Theory says•Age of the Universe Abundance of

H & He•Red Shifting

•CBR•Holes in the Theory

What the Theory says…•(I had to use the

top of the page, as well as the flap.

•13-15 BYA (billion years ago), the universe expanded rapidly from a single point called a singularity.

What the Theory Says…• The event (which was

not an explosion) was very hot and atoms were not yet formed- material cooled and condensed into what was called “quark soup.”

• As the material cooled and the heat spread out, atoms of the lighter elements formed (Hydrogen and Helium)

• www.jb.man.ac.uk/astronomy/wonder/theme2.html

What the Theory Says…

•The universe continues to expand rapidly.•At the Big Bang Event, all matter and

energy formed. Before that, there was nothing.

•Resulted in the 4 Forces of the Universe:▫Gravity▫Electromagnetism▫Strong Nuclear Force▫Weak Nuclear Forcewww.scienzagiovane.unibo.it/english/darkmatte...

Age of the Universe• Most all

models of the age of the universe is 13-15 billion years old (consistent with what the BBT predicts).

Abundance of H & He• The amount of H and He today is abundant- closely

match what is predicted there should be from the BBT▫ hyperphysics.phy-astr.gsu.edu/.../hydhel.html

Red Shifting• Due to the Doppler Effect, a light wave moving away

increases in wavelength, shifting it’s color to the red end of the EM spectrum, and appears more red. • (oppositely, objects moving toward you would appear more red as their wavelengths are

shortened)

• Almost everything we observe in the universe is red shifting, meaning the universe is expanding away from us in all directions.

Electromagnetic Spectrum & Visible Light

www.docstoc.com/.../Red-Shift-Blue-Shift

CBR•Cosmic Background

Radiation is leftover heat from the initial Big Bang Event.

•It is thermal radiation that fills the universe in every direction, detected with a radio telescope.

•Universe avg. temp is 2-3° Kelvin.

Holes in the Theory

•The BBT▫Seems to “defy” the Law of Conservation of

Mass and Energy by them being created.▫Seems to defy the 2nd Law of

Thermodynamics (ENTROPY) that the universe gets more disorderly.

▫Violated the rule that nothing travels faster than the speed of light.