Laab sheet for creating oxygen and carbon dioxide in the elementary science classroom. Data tables and demonstrations are included.

1. PRINCIPAL INVESTIGATOR ________________ RECORDER _____________
REPORTER ___________________ MATERIALS MANAGER ______________
GENERATING GASES IN AIR
PURPOSE: TO GENERATE SOME OF THE GASES THAT MIX TOGETHER IN
AIR.
EXPERIMENT I
MATERIALS: BAKING SODA, VINEGAR, A BEAKER. SMALL RECTANGLE
OF WAXED PAPER, A QUART ZIP LOCK BAG, A SPLINT.
PROCEDURE:
1. MEASURE 2 TEASPOONS OF BAKING SODA ON THE SMALL PIECE OF
WAXED PAPER.
2. FOLD OVER THE SIDES AND FOLD UP THE EDGES.
3. PLACE THE PIECE OF FOLDED WAX PAPER AND ITS CONTENTS INTO
THE ZIP LOCK BAG.
4. POUR 100 mL OF VINEGAR INTO THE ZIP LOCK BAG.
5, FLATTEN THE ZIP LOCK BAG MAKING SURE THAT NO AIR IS TRAPPED
INSIDE. THEN SEAL THE BAG CAREFULLY.
6. CAREFULLY RIP A HOLE IN THE WAXED PAPER,
7. GENTLY SHAKE THE BAG SO THAT THE BAKING SODA MIXES WITH
THE VINEGAR.
8. OBSERVE AND INFER--WHAT CAN YOU CONCLUDE.
9. WITH THE TEACHER STANDING BY, GENTLY OPEN YOUR BAG AND
HAVE THE TEACHER PLACE A BURNING SPLINT INSIDE IT. OBSERVE AND
INFER (CONLUSIONS)
OBSERVATIONS INFERENCES

2. EXPERIMENT II
MATERIALS: YEAST, HYDROGEN PEROXIDE, SPLINT, BEAKER, QUART
ZIP LOCK BAG, SMALL RECTANGULAR PIECE OF WAXED PAPER.
PROCEDURE:
1. MEASURE ONE TEASPOON OF YEAST ON TO THE PIECE OF WAXED
PAPER.
2. FOLD OVER THE SIDES AND FOLD UP THE EDGE OF THE PIECE OF
WAXED PAPER.
3. PLACE THE WAXED PAPER AND ITS CONTENTS INSIDE THE ZIP LOCK
BAG.
4. MEASURE 50 mL OF HYDROGEN PEROXIDE INTO THE ZIP LOCK BAG.
5. FLATTEN THE BAG SO NO AIR IS TRAPPED INSIDE IT AND SEAL THE
BAG.
6. CALL YOUR TEACHER OVER TO YOUR TABLE BEFORE YOU MIX THESE
TWO SUBSTANCES.
7. VERY GENTLY RIP THE WAXED PAPER SO THAT THE YEAST CAN MIX
WITH THE HYDROGEN PEROXIDE.
8. GENTLY SHAKE THE BAG SO THAT THE CONTENTS MIX.
9. OBSERVE CAREFULLY. REMEMBER YOUR OBSERVATIONS BECAUSE
YOU WILL NOT HAVE TIME TO WRITE THEM DOWN RIGHT NOW BECAUSE
THIS GAS RAPIDLY ESCAPES.
10. WHEN THE TEACHER IS STANDING BY WITH A GLOWING SPINT, OPEN
THE BAG SO THA THE SPLINT CAN BE IMMEDIATELY INSERTED..
11. OBSERVE.
OBSERVATIONS INFERENCES

3. • IN BOTH EXPERIMENTS, YOU OBSERVED FIZZING AND BUBBLING.
WHAT CAN YOU INFER WHEN YOU OBSERVE BUBBLES?
______________________________________________________________
•BECAUSE GASES OFTEN ARE INVISIBLE, ODORLESS, AND TASTELESS,
HOW DO YOU TELL THE DIFFERENCE BETWEEN GASES?
________________________________________________________________
•IN THESE TWO EXPERIMENTS, YOU MADE GASES. CAN YOU TELL THE
DIFFERENCE BETWEEN THESE TWO GASES BY HOW THEY LOOK, FEEL,
SMELL. TASTE , OR FEEL? ___________ DESCRIBE WHAT YO U WOULD
SEE WHEN LOOKING AT THESE GASES:I____________________________
_______________________________________________________________
•TO YOUR EYES, BOTH GASES SHOULD HAVE LOOKED THE SAME, WERE
THEY THE SAME GASES? ___________
•THE GLOWING SPLIT IS A TEST FOR WHAT GAS ? ________
•WHAT HAPPENS IF A GLOWING SPLINTIS PLACED IN
OXGEN,? _______________________________________________________
•WHAT IS A TEST FOR CARBON DIOXIDE?
________________________________________________________________
________________________________________________________________
DEMONSTRATIONS:
THREE CANDLES OF DIFFERENT HEIGHTS, IN AQUARIUM. ADD BAKING
SODA AND VINEGAR. OBSERVE
POUR THE GAS MADE FROM BAKING SODA AND VINEGAR FROM A
PITCHER ONTO A BURNING CANDLE. OBSERVE
TURN A JAR UPSIDE DOWN OVER A BURNING CANDLE.
WHAT HAPPENS TO THE BURNING CANDLE? ________________________--
THE GAS THAT IS LEFT IN THE JAR WOULD BE MOSTLY NITROGEN.