00:00:00
STEVE: What do you get when you
mix Mentos, Diet Coke, a
00:00:02
skateboard, 150 teachers in
Oklahoma City, in an area
00:00:05
that's riddled by tornadoes?
00:00:09
I don't know, but we
did it anyway.
00:00:13
I'm Steve Spangler, and I'm all
about making science fun.
00:00:16
For the last 20 years, I've
been teaching ways to turn
00:00:19
ordinary science experiments
into unforgettable learning
00:00:23
I have an amazing team who will
do whatever it takes to
00:00:26
affect the way people
think about science.
00:00:28
And to do that I live
by one motto.
00:00:31
Make it big, do it right,
give it class.
00:00:39
Well, if you've never seen the
Mentos and Diet Coke reaction,
00:00:41
where have you been living
all this time?
00:00:44
I'll give you a 20-second
crash course.
00:00:47
Soda by its very nature is
packed with carbon dioxide and
00:00:50
it wants to come out when
you open up the cap.
00:00:52
In fact, anything you drop
inside will help that
00:00:54
carbonation come out.
00:00:55
Mentos have tiny little pits
or craters on the outside.
00:00:59
They're called nucleation
points.
00:01:00
It's the perfect place
for carbon
00:01:02
dioxide bubbles to gather.
00:01:03
Because they're so heavy, when
you turn it over and drop it
00:01:06
down inside, they fall to the
bottom, the carbon dioxide is
00:01:08
released, and you get
the perfect geyser.
00:01:17
We have to thank Lee Marek, a
chemistry teacher-- not only a
00:01:20
chemistry teacher, a great
chemistry teacher-- from
00:01:21
Naperville, Illinois, who shared
at a conference that if
00:01:25
you happen to use Mentos, it was
a nice substitute for the
00:01:30
That's how the Mentos started.
00:01:32
I can tell you that nobody
really cared for
00:01:33
a long, long time.
00:01:35
It wasn't until September
of 2005, the lovely Kim
00:01:39
Christensen, was in the backyard
at KUSA 9 News, when
00:01:43
she happened to get a little
soaked because she didn't move
00:01:48
Three, two, one, pull.
00:01:53
Tell me that that's
not awesome?
00:01:56
KIM CHRISTENSEN: I did get it.
00:01:56
STEVE: So sorry.
показать еще
русский▼
English
