Question: What will happen to the fizzy drink when mints are added?
Hypothesis: We think the mints will mix with the coke and it will fizz and froth up and explode. There will be big bubbles at the bottom of the bottle. So we think carbon dioxide will cause pressure and ozze coke over the sides.
Equipment:
1.5 litre Coke bottle
9 mints
2 pieces of card
Method:
1. Take the lid off the bottle of coke.
2. Put the card over the bottle neck
3. Roll up the tube of card and tput over the neck of the bottle
4. Put the mints into the tube
5. Pull the card away slowly so the mints drop into the bottle. RUN!
Investigation Results:
When we put the mentos into the coke the it erupted causing foam to spew up out of the bottle. The reason for this is coca cola contains carbon dioxide gas that has been forced into the liquid under pressure. When you unscrew the lid, it releases the pressure and the carbon dioxide forms bubbles. When we added the mentos it helped the bubbles escape so quickly that the erupted out of the bottle in foam.
Check out these pictures:
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| Getting ready for the mentos to go into the coke.... |
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| Getting ready to run! |
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| The audience waiting in anticipation.... |
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| Look at what happens! |
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