Jon Bergmann: Just how small is an atom?
Jon Bergmann co-wrote the book on the "flipped classroom" -- using video to help students master new ideas outside the traditional class setting. Full bio
Double-click the English transcript below to play the video.
som kallas atomer
of little tiny things called atoms
består av ännu mindre delar
is made up of even smaller particles
och elektroner.
that atoms are small.
att atomer är små.
hur små atomerna verkligen är.
about how small atoms really are.
that they are really, really small.
let's ask this question:
finns det i en grape?
is made up of only nitrogen atoms,
enbart består av kväveatomer,
men det finns kväveatomer i grape.
are nitrogen atoms in a grapefruit.
blåser vi upp varje atom
let's blow up each of the atoms
behöva vara?
would the grapefruit have to be?
- faktiskt lika stor som jorden.
-- well, actually, the Earth.
the Earth with blueberries,
fyllde jorden med blåbär,
of nitrogen atoms as a grapefruit?
som i en grapefrukt?
It gets even more crazy.
Det blir ännu mer galet.
-- and thus the blueberry, right? --
- i blåbäret här alltså, eller hur? -
is something called the nucleus,
som kallas för kärna,
in the Earth,
av atomer på NO-lektionerna
of the atom from science class,
med en pil som pekade på kärnan.
with an arrow pointing to the nucleus.
they're not drawn to scale,
och letade efter atomkärnan...
and were searching for the nucleus ...
the blueberry --
as a two-story house.
som ett tvåvåningshus.
i mitten av atomen.
in the center of the atom.
It would just barely be visible.
around how big the nucleus is,
hur stor kärnan är,
till storleken av en fotbollsarena.
up to the size of a football stadium.
of a football stadium,
stor som en fotbollsarena,
in the center of the atom,
and you could see it!
of a small marble.
som en liten spelkula.
redan förvirrat dig helt.
blown your mind by now.
neutroner och elektroner.
neutrons and electrons.
lever inuti atomkärnan,
live inside of the nucleus,
all of the mass of the atom.
the size of a football stadium,
stor som en fotbollsarena
and the electrons on the edge,
och elektronerna på kanten,
and the electrons?
there are vast regions of empty space.
finns stora områden tomhet.
some electromagnetic fields,
bara räknar saker, alltså materia.
matter, it is empty.
is inside the blueberry,
finns inuti blåbäret,
inuti grapefrukten.
in the grapefruit.
om jag kan bli ännu mer tokig.
if I can even get more bizarre.
of an atom is in the nucleus --
finns i kärnan -
i elektronerna,
of mass in the electrons,
kilograms per meter cubed.
OK, I'll put it in English units.
per cubic feet.
by one foot by one foot.
från en typisk bil.
all of the nuclei from a typical car.
skulle du behöva lägga i lådan
have to put into the box
som i en atomkärna?
the same density of the nucleus?
antalet människor på jorden.
of people in the Earth.
owned their own car --
cars into your box ...
the density of a nucleus.
lika tätt som en atomkärna.
att om du tog alla bilar i världen
every car in the world
like blueberries in the Earth.
som blåbär i jorden.
of a football stadium,
till en fotbollsarenas storlek,
is a marble in the middle.
of vast regions of empty space.
in your one-foot box.
dessa bilar i din 3 dm stora låda.
ABOUT THE SPEAKER
Jon Bergmann - EducatorJon Bergmann co-wrote the book on the "flipped classroom" -- using video to help students master new ideas outside the traditional class setting.
Why you should listen
Jon Bergmann is considered one of the pioneers in the Flipped Class Movement -- in fact, he co-wrote the book on the Flipped Classroom, available from ISTE Press in June 2012. Bergmann believes educators should ask one guiding question: What is best for my students in my classroom? To the best of his abilities he has done this in his two-plus decades as a high school science teacher. He received the Presidential Award for Excellence for Math and Science Teaching in 2002 and was named Semi-Finalist for Colorado Teacher of the Year in 2010. He blogs at flipped-learning.com.
He is the Lead Technology Facilitator for the Joseph Sears School in Kenilworth, Illinois.
Read about the making of "How Small Is an Atom?" >>
Jon Bergmann | Speaker | TED.com