Teacher Aldo stands in the lab.

Teacher Aldo is in his thirties, with short curly black hair and a goatee. He wears glasses and a blue Homework Zone T-shirt.

He says HEY THERE, IT'S
TEACHER ALDO HERE,
AND WELCOME TO
THE
HOMEWORK ZONE.
TODAY,
WE'RE GOING TO DO
A REALLY NEAT
EXPERIMENT
TO SHOW
CHEMICAL REACTIONS.
YOU'RE GOING TO NEED A
FEW ITEMS AT HOME.
FIRST THING
YOU'RE GOING TO NEED
IS AN EMPTY
BOWL.
YOU'RE GOING TO
NEED AN EMPTY BOTTLE,
AS WELL AS A
BALLOON,
AND IF YOU
HAVE, A FUNNEL.
YOU'RE ALSO GOING
TO NEED A
LITTLE BIT
OF VINEGAR AND SOME
BAKING SODA, AND
WHAT WE'RE
GOING TO DO IS
WE'RE GOING TO
TAKE THE EMPTY
BOTTLE AND
WE'RE GOING TO
PUT IT GENTLY IN
OUR BOWL, AND AT
THIS POINT IF
YOU HAVE A
PARENT OR GUARDIAN
AT HOME IT WOULD BE
GREAT FOR THEM
TO HELP YOU
WITH THIS EXPERIMENT.
THE NEXT THING WE'RE
GOING TO DO
IS WE'RE GOING
TO TAKE A LITTLE
BIT OF VINEGAR AND
WE'RE GOING
TO GENTLY
POUR IT INSIDE THE
EMPTY BOTTLE.
JUST ABOUT
A QUARTER FULL.
NEXT THING WE'RE
GOING TO DO IS
WE'RE GOING TO
TAKE A LITTLE BIT
OF BAKING SODA AND
WE'RE GOING
TO TAKE OUR
FUNNEL AND WE'RE
GOING TO GENTLY
TRY TO PUT THE
BAKING SODA
INSIDE THE BALLOON.
YOU MIGHT HAVE
TO PLAY AROUND
A LITTLE BIT
WITH IT TO GET IT
ALL IN
THERE.
THERE
WE GO.
SHAKE IT A
LITTLE BIT,
AND WHAT YOU WANT
TO DO IS TRY
TO FILL IT
UP AT LEAST A
THIRD OF THE
WAY,
AND NOW WHAT
YOU'RE GOING TO DO
IS YOU'RE GOING TO
GENTLY REMOVE
THE BALLOON
FROM THE FUNNEL,
AND YOU'RE GOING TO
TAKE THE LIP OF
THE BALLOON
AND GENTLY PUT IT
OVER THE BOTTLE THAT
HAS VINEGAR
IN IT.
YOU'RE GOING TO
HOLD THE LIP DOWN
AND YOU'RE GOING
TO EMPTY
THE
BAKING SODA.
WATCH WHAT
HAPPENS.

The balloon starts to inflate.

Aldo says SO, WHAT
YOU'RE WITNESSING
RIGHT NOW IS YOU'RE
WITNESSING
A
CHEMICAL REACTION,
WHERE THE BAKING
SODA REACTS
WITH THE
VINEGAR TO RELEASE
A GAS CALLED CARBON
DIOXIDE,
AND THE CARBON
DIOXIDE EXERTS
A PRESSURE ON
THE INSIDE OF
THE BALLOON, WHICH
INFLATES THE BALLOON.
IT'S A GREAT
EXPERIMENT
FOR YOU
TO TRY AT HOME.
I'M TEACHER ALDO,
AND NOW YOU KNOW.