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CARBON DIOXIDE

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					          EXPERIMENTING…
    Bubbles           Vinegar

                      Plastic Fish
   Candles            Tank




Baking Soda
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)




   WHY?
                              Candles Off




           A Liquid is left
SO WHY DID THE CANDLES TURN
         OFF???????

• Vinegar + Baking Soda à Carbon Dioxide
• Carbon Dioxide STOPS burning
• Carbon Dioxide is found in some Fire
  Extinguishers
3- CANDLE OFF:WHAT HAPPENS IF
    WE ADD BUBBLES AGAIN?




   WHY?
                             Bubbles Float




          A Liquid is left
     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
   LET’S VISUALIZE THIS: WHY
        BUBBLES FLOAT?

AIR IS INSIDE
THE BUBBLE
                AIR LAYER




                            CARBON
                            DIOXIDE
                            LAYER
                            NOT
                            VISIBLE
   CARBON DIOXIDE

            CO2
Do YOU know what it is? (Sol., Liq., gas)
       WHERE do we find it?
         WHY is it useful?

				
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posted:7/23/2013
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