The first element is . . .
of The Periodic Table of Elements. H stands for Hydrogen.
Can you find it in the table on slide 2?
Most of the ordinary matter in our
universe consists of hydrogen.
of the matter in the universe are all the other elements.
3/4 of the matter
in the universe
One hour is 60 minutes, so there are 3 doublings in an hour.
Now suppose the cells continue to multiply for seven hours?
How many doublings would that be?
That would be 7 hours x 3 doublings/hour = 21 doublings.
the number you get is above 2 million cells!
is a theory
the origin of
a single point
it has expanded
to its current
shortly after the Big Bang.
in our solar system
are mostly hydrogen.
the nuclear fuel of our Sun.
an icy mantle and a core of rock and ice.
locked up in
on the surface
of our own planet.
that the formula
for water is
H stands for hydrogen.
O stands for oxygen.
This formula tells you that every water molecule in our oceans, rivers, lakes and clouds is made up of
two hydrogen atoms and
one oxygen atom.
two hydrogen atoms
linked to one oxygen atom.
are combined together to form words,
elements of the periodic table
are combined together to form molecules.
Two hydrogen atoms
combine with one oxygen atom
to form a molecule of water.
with graphite rods
in your kit.
of salt into the tray.
the surface of the water,
tilt the open end of each tube up
until all the air bubbles out of the tube.
There should be NO air left in the tubes.
into the tray.
to the positive terminal
of the 9 Volt battery.
Connect black wire to
the negative terminal.
of one tube up and
connect the red wire
to one graphite rod.
This will be your
to the other graphite rod.
This will be your
the metal teeth on the black lead.
DON'T SHORT OUT THE BATTERY!
rise to the top of each tube.
If you don’t get bubbles, add more salt
and check your battery.
WAIT at least 15 minutes for the tube
collecting hydrogen to fill up with gas.
This black wire was connected to the negative terminal of the battery.
The oxygen will collect in the tube with the positive electrode (red wire).
without tipping the tubes.
in order to split water into hydrogen and oxygen.
Water is a very stable compound.
This is why water is so stable for cooking.
It will not catch fire.
You can think of water as already burned.
Hydrogen, on the other hand,
is extremely flammable.
the one that was connected to the BLACK WIRE.
KEEP THE OPEN END OF
THE TUBE POINTING DOWN!
the hydrogen is so light, it will float away immediately.
Bring it near the hydrogen
in the test tube.
YOU POPPED HYDROGEN!
It makes an excellent fuel, so good in fact, that it was used in the space shuttle as ROCKET FUEL!
Why were scientists so excited about this possibility? ROCKET FUEL!
They hope to use frozen Moon water
to fuel return trips to Earth,
as well as to launch further explorations
of the solar system.