Seeing sound

Materials we used for our science experiments:

Jar

Balloon

Scissors

sugar

Step 1: We cut the end of the balloon.

Step 2: Stretch over top of jar.

Step 3: Sprinkle sugar on top of the balloon and finally we had to humming to make the sugar vibrate.

Conclusion: We notice that when we were making a humming the sugar was bouncing up and down.

Do you think the sound make the sugar bounce up and down or was it your breathe or your nose.

Balloon experiment

Today room 7 students did a science experiment. We had to put baking powder in the balloon and then blow it up and see what it would sound like.

Here some tips to do this.

Step 1: Put the balloon over the funnel

Step 2: Add a few spoonfuls of icing sugar into the funnel and shake it down to the balloon.

Step 3: Remove the funnel, inflate the balloon and tie the neck to stop the air and icing from escaping. Don't inhale when blowing up the balloon - you'll get icing in your mouth.

Step 4: Go outside to your large open space. Your helper should hold the balloon and a pin. Walk 100 large paces away from them to see if you can hear a sound come out from the balloon.

Step 4: Ask your helper to hold the balloon away from their body. Look at the balloon and signal for your helper to pop it. Watch and listen very carefully - you will hear the balloon pop and see the icing sugar escape.
This is what we did today for our science experiments.