Hearing and sounds (6th Grade)

Hello children!

In 6th Grade, we are revising the senses. We did a couple of experiments that you can do at home. They're easy, clear and fun.

MATERIALS:

EXPERIMENT 1:                                   EXPERIMENT 2:

              - A wire clothes hanger                                    - A can

                          - 2 strings                                          - A balloon

                    - Some salt / sugar               - Something to make strong noise 

                                                                 (we used a cover pan and a spoon)

EXPERIMENT 1:

- Make noise with the hanger (for example hitting it to a table) and listen.

- Make the same noise again but this time listen through the strings:

 You will hear a strong GONG!

That's because the sound waves can travel through air, liquids and solids. When we listen to the hanger through the strings, we receive this information through a solid. And solids can transmit sounds better than gases:

1- Solids

2- Liquids

3- Air

EXPERIMENT 2:


We built an EAR DRUM with a can and a balloon to understand how it vibrates with sounds: