What do you know about the Big Bang Theory? List anything  Bellwork 11/6 What do you know about the Big Bang Theory? List anything  This …not this

Unit 3: Beyond our Solar System Topics: Big Bang Theory Evidence of the BBT Hubble’s Law/Red Shifting Large Hadron Collider Stellar Properties Stellar Evolution Nucleosynthesis Black Holes/ Supernova Galaxies Fate of our Universe?

Article Discussion Go through each question with your group On a whiteboard, outline your group’s answers to #’s 7 & 8 Be prepared to share these with the class

What is the Big Bang Theory? marks the inception of the universe Occurred about 14 billion years ago All matter and space was created This image is a misconception…

How did it happen??

Big Bang Theory Timeline Take notes as we walk through the timeline of the Universe.

Time begins The universe begins ~13.7 Billion years ago The universe begins as the size of a single atom The universe began as a violent expansion All matter and space were created from a single point of pure energy in an instant

Modern Physics 10x 10 -40 seconds after the Big Bang Earliest point we can describe using modern physics Gravity, Electromagnetic Forces, Strong Force (holds atoms together) All of the matter in the Universe is created

Nuclei of Hydrogen & Helium Form 0.1 seconds after the Big Bang Protons and Neutrons begin to form Too hot for electrons to bind “+” and “– “ particles bind to form a plasma Absorbs electromagnetic radiation

Atoms Form ~ 3 minutes after Big Bang E=mc2 energy froze into matter according to Albert Einstein’s equation. This basically says that like snowflakes freezing, energy forms matter into clumps that today we call protons, neutrons and electrons. These parts form into atoms Universe becomes transparent

~200 to 400 million years after Big Bang 1st stars and galaxies form End of the “Dark Ages”

Heavier Elements ~1 billion years after Big Bang Stars began to die and collapse in on themselves Generates immense temperature & pressure…which leads to heavier elements (more protons & neutrons)

Our Sun and Solar System ~4.6 billion years after Big Bang Sun forms from remains of supernova Nebular Hypothesis

Earliest Life ~12 billion years after the Big Bang VERY simple life forms Archaea

Misconceptions about the Big Bang there was no explosion; there was (and continues to be) an expansion Rather than imagining a balloon popping and releasing its contents, imagine a balloon expanding: an infinitesimally small balloon expanding to the size of our current universe we tend to image the singularity as a little fireball appearing somewhere in space space began inside of the singularity. Prior to the singularity, nothing existed, not space, time, matter, or energy - nothing.

“How the Universe Works: Big Bang” Exit Slip On one side of your notecard: Questions you have during the video On the other side of your notecard: Topics that interest you or that you want to know more about Please, come up with at least 2 items on each side

Basic Elements Form 3 minutes after the Big Bang Hydrogen & Helium Still make up most of the Universe Strong evidence for the Big Bang At this point, the Universe is already incomprehensibly large… Think back to our Scale of the Universe activity

Stars and Galaxies are formed 1 billion years after the Big Bang Pockets of dense gas form