Coke & Mentos Geyser

Things have been fizzing in Room 19 this week. We have been investigating chemical reactions and have had lots of fun doing it.  Before we started we had to hypothesise about what we thought would happen. We used our SOLO thinking levels to make our predictions then we headed outside to see how accurate they were.

Be warned - this gets messy. Make sure you check with Mum or Dad first.

What you will need:
2L Bottle of Diet Cola
1 pkt Mentos lollies
Geyser Tube (Optional - available from Nature's Discoveries in Riccarton)

What you do:
1. Go outside.
2. Put the bottle of cola on the ground (or dug into a little pile of liquefaction!)
3. Load the geyser tube and pull the trigger OR VERY QUICKLY tip 7 mentos lollies into the cola.
4. STAND BACK.

Photo by Julius

Wonderings:
Does it work with different flavours of mentos?
Would it make a difference if we used different brands of cola?
Will it still work if we used lemonade?
Could you use other types of mints?

Thank-you to Jamie from Room 20 for recording our investigation.

Check out these sites to find out about the science behind the excitement.

http://www.stevespanglerscience.com/experiment/original-mentos-diet-coke-geyser

http://www.youtube.com/watch?v=kme9UQAphmY