EXPERIMENTING…

CandlesPlastic Fish Tank

Baking Soda

Bubbles Vinegar

1- CANDLES OFF: WHAT IS GOING TO HAPPEN TO THE BUBBLES?

2A- CANDLES ON: IF WE ADD VINEGAR WHAT IS GOING TO HAPPEN?

2B- CANDLES TURN OFF IN ORDER ACCORDING TO THEIR SIZES (:- o)

A Liquid is left

Candles Off

WHY?

SO WHY DID THE CANDLES TURN OFF???????

• Vinegar + Baking Soda Carbon Dioxide• Carbon Dioxide STOPS burning• Carbon Dioxide is found in some Fire

Extinguishers

3- CANDLE OFF:WHAT HAPPENS IF WE ADD BUBBLES AGAIN?

A Liquid is left

Bubbles Float

WHY?

SO WHY DID THE BUBBLES FLOAT???????

• Carbon Dioxide is a “HEAVY GAS”• Carbon Dioxide is heavier (more dense) than

AIR• AIR will float on Carbon Dioxide • A bubble is AIR surrounded by soap

CARBON DIOXIDE LAYER NOT VISIBLE

LET’S VISUALIZE THIS: WHY BUBBLES FLOAT?

AIR LAYER

AIR IS INSIDE THE BUBBLE

CARBON DIOXIDE

Do YOU know what it is? (Sol., Liq., gas)WHERE do we find it?

WHY is it useful?

CO2