THIS WAS THE BEST-BEST-BEST show so far!!!!
This show had ethos, it had pathos, it
validates the value of PBS delivered courses.
Here we have a collection of the BEST
scientists from several various fields
sharing insight THAT MAKES SENSE!
Besides, I got to me my mother on TV!!!!
Mother Earth.
Well, our Earth started millions (10) of years
ago. There was this big old gas and dust cloud.
The gas and dust started to stick together and
pulled itself into the Earth. First, and gas and
dust made a small ball, then it grew bigger and
bigger. The stuff in the middle began to get
compressed by the weight and the heavy stuff
settled down while the light stuff rose up.
As a result, the CORE of the Earth is mostly
IRON. And it is so compressed that it is HOT.
And because it is HOT it is liquid. Like hot
tar. And because some parts of the core
are hotter than others the core spins.
(You get the same effect when boiling soup
in a pot on the stove...you can see the
soup circulating) This is called CONVECTION.
Because the core circulates the iron makes
a magnetic field around our Earth. Like
all magnets (I know of at least) there is a
Possitive(North) and negative(South) pole.
This convection caused Earth's core generated
magnetic field is named that DYNAMO EFFECT!!!
(This show puts things together real nice.)
Well, the Earth is really like alive, see.
The core spews out hot rock and gas, this
causes volcanos. The volcanos make mountains.
Weather wears down the by erosion. And the
Earth remains pretty dog gone livable.
The Earth RE-CYCLES!!!
Long before environmentalists got on the band
wagon, the Earth was re-cylcing. Through
PLATE TECTONICS the Earth sucks down parts
of the crust and spews out more crust.
Now, we find the new stuff coming forming on
the bottom of the oceans, and the old stuff
going down on the continental ridges, like
CALIFORNIA. California--oh no...I have
a boy friend there. I should call and see if
he's alright.
So, while the Earth had some heavy duty
comet hits when it was new, most of the
craters have been erased because of this
plate tectonic recylcing.
Come on, comets are what cause chuck holes!
And another thing, this one I have always
wondered about...kind of like the chicken
and egg thing. Which came first, plants
or animals? When the Earth was still
pretty new, its atmosphere was He, H and CO2
Ah, He-lium an H-ydrogen C-arbon di-Oxide.
Well, there was a lot of CO2 in the air but
very little O. But, the Earth had OCEANS.
The CO2 did not block the ultraviolet sun rays
and we were doing the old scortched Earch
routine. But, in the oceans, the water was
effective in filtering out some UV and
the CO2 turned into LIMESTONE and that left
a lot of HO2 with some CO2 and pretty soon,
on July 5th, -60,000BCT a plant grew underwater.
It was Kelp I think. Because I lke to eat Kelp.
Well, with plants and that photosynthesis thing
they do, they sucked up the water-born co2,
imagine a whole ocean of fiz water, and they
exhailed O-xygen. Of course the O-xygen
rose a bubble and made its way to our atmosphere.
And then we had an atmosphere of O-xygen which
could and did support AnIMAL life. So, plants
came first and prepared the way for animals.
With the O-xygen came a GREENHOUSE effect
which allows enough UV in from the sun
to warm the ground and keeps enough warmth
under the atmosphere to keep us from
freezng. Thank you Mr. Ozone.
"Spock-Fastenating, Captain."
Well, our planet Earth is the product of
four major systems. They are:
Atmosphere
Hydrosphere
Iron-Core Dynamo Effect
Plate Tectonics.
We are EARTHLings--be proud!!!
