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Mr Loyd's Big Bang! Intro to Chem & Life 2
Transcript of Mr Loyd's Big Bang! Intro to Chem & Life 2
Where did we all come from?
A really deep idea to ponder
DCHS Adv Bio
Ch 2 Chemistry
And God said:
Let there be light!
The Big Bang !
Click on the above link to go to much more info about the Big Bang
Creation of the Universe: about 13.7 billion years ago—according to cosmologists (are they the people who do your nails? No !)
Then what's Cosmology you ask? The study of the cosmos (universe)
The Big Bang (BB) initially created a “Quark Soup” (sub-nuclear particles that when put together make up protons and neutrons (p + n)
As the new universe cooled these quarks were able to make p + n; about 3 min after the BB
After more cooling p + n make the light elements Hydrogen and Helium (H and He )
WOW.....that's a lot to try to get my head around. Can't we see a simple diagram of all this?
Of course, let's break it down
Oh, that was helpful !?
OK, a bit simpler then....
Let's take a look at the Creation of Hydrogen isotopes (H, Deuterium and Tritium) and Helium from protons + neutrons
How Stars Form
After the BB formed H and He, there were areas of greater and lesser gas density (clumpiness)
Where H gas density was greater, gravity caused the H gas to condense and form giant gas clouds
When enough H condensed, the great heat and pressure caused the H gas to ignite into a star
The stars' fusion of H to He lets off light and heat which we see as Sunlight or starlight
Large collections of stars make galaxies, like our Milky Way
Creation of Elements heavier than He
In addition to forming He from H during fusion, small stars also “cook up” to heavier elements like Oxygen and Fluorine in their interiors
Nucleosynthesis: How to "Cook" new elements
How do you get the really heavy elements?
Well, those can only be created in gigantic stars, ones much bigger than our little star, the Sun.
What happens when a big star explodes?
Supernova create Elements heavier than Fe—up to Uranium (92)
When really big stars explode as supernova, they scatter all their lighter and heavier elements into the heavens
All this supernova “stardust” can then collect under gravity into new solar systems forming both new stars and rocky planets like Earth
So what's an exploded star
or Supernova look like ?
Cool, so now we have all the ingredients
for planets and life but they're scattered
throughout the galaxy. How about getting
back to where I came from? OK.
Stardust and H gas condense to form a new solar system, often under the influence of nearby supernova shockwaves
Young solar systems have lots of rocky collisions that eventually form planets and asteroid belts, like ours.
OK, let me see if I can remember
all this--we begin at the Big Bang
Exactly. It's "element"-ary,
my dear Watson.
Let's finish with
a Bang! A final Big
picture, shall we?
Not really what I was thinking of....don't you have a short video that explains it all? Ahhhh....
let's see. How 'bout this?