Term 2 finished with a bang!

We made fizz bombs to end Term 2 with a bang!  First everyone wrote their own set of procedures to make a fizz bomb and numbered,  labelled diagrams.  When our written procedures were finished, we worked with a buddy.  We had to follow each step in the right sequence.  We had to work carefully to divide the film canister into thirds so that we could pour water up to the one third mark.  Next we had to break the Alka Seltzer tablet into quarters.  We found it was easier to first break it in half, and then break the half into half again, so that we ended up with four quarters.  It was important to add the tablet to the water outside, and very quickly snap the lid on tightly so no gas could escape.  To start with, we had a couple to explosions in the classroom when we weren't quick enough!

Shaun and Kylie marked their film cannister carefully into thirds; then Shaun snapped the tablet into quarters.

We let our fizz bombs explode outside; it was funny waiting because you couldn't predict accurately when they would explode.  We had enough materials left over to make more with the Junior Science Club at lunchtime - by then, we were experts!