TRICKS OF INVISIBLE GAS

EVERYTHING HAS TO BE SOMEWHERE

THERE'S THE EVIDENCE!

SUBLIMED MOTHBALLS

AIR RESISTANCE

CATCHING A BREATH OF AIR

UN-INVISIBLE AIR

FEELING THE AIR

SCENTS IN THE AIR

MAKING CARBON DIOXIDE

COLLECTING THE CARBON DIOXIDE WE'VE MADE

DETECTING THE PRESENCE OF CARBON DIOXIDE

NO EXPERIMENTS WITH HYDROGEN

A LITTLE FUN WITH OXYGEN

DETECTING THE PRESENCE OF OXYGEN

THE SHAPE OF GASES

FUN WITH AIR AND WATER

DOES AIR HAVE WEIGHT?

DOES CARBON DIOXIDE WEIGH MORE THAN AIR?

CAN CARBON DIOXIDE PUT OUT A FIRE?

IS THERE A GENIE IN THE BOTTLE?

HEAT AND CHILL SOME INFLATED BALLOONS

TERRITORIAL BATTLES OF AIR AND LIQUID

A DIFFERENT WAY TO PUT OUT A CANDLE

MORE BALLOON FUN

ANOTHER BALLOON TRICK

AN INCREDIBLE TRICK WITH A JAR AND A BAG

A GREAT TRICK WITH NEWSPAPER AND YARDSTICK

MAKING AN ALTIMETER

MORE FUN WITH AIR PRESSURE

STILL ANOTHER TRICK WITH AIR PRESSURE

MAKING FIRE EXTINGUISHERS

MORE BALLOON VS. AIR PRESSURE FUN

GO AHEAD! BLOW IT UP!!!

HOW CAN WATER BE A LEVER?

MAKING A BAROMETER

MAKING AN AIR BAROMETER

DIFFUSION OF GASES

BLOWIN' IN THE WIND

MORE ABOUT AIR MOVEMENTS

MAKING AIR MAKE SOMETHING HAPPEN

MAKING AIR MOVEMENT WORK FOR US

MAKING A FANCY BAROMETER

A LITTLE PROJECT WITH EXPANDED AIR

POPPED POP BOTTLE CAPS