Grade 4 ScienceGrade 4 ScienceSoundSound

What What isis Sound? Sound?• Our first step…brainstorming ideas!• I had the students think of words or

anything that came to mind, when they think about “Sound”

• There were lots of great ideas generated!

• As a class we did the first 2 columns of the KWL chart together…

VibrationsVibrations• We had defined vibrations as

something moving back and forth very quickly; vibrations create Sound

• Then we moved onto our first experiment to test out vibrations!

Sound is Sound is VibrationsVibrations• Experiment # 1: To examine (hear and feel) sound vibrations!• Materials: • You will need-

A Partner.A balloon.

• Method:What you have to do-

• 1) Blow up the balloon.2) Hold it against your ear.3) Ask your partner to press their lips against the balloon and speak.4) Repeat steps 3 and 4 but this time you should speak and your friend should listen.

Frequency & Pitch Frequency & Pitch

• We defined pitch as: how high or how low a sound is; depends on the number of vibrations

• We defined pitch as how high or low a sound is; depends on the number of vibrations

Experiment # 2Experiment # 2• Experiment: to contrast high pitch and low

pitch!• Materials: • You will need-

3 bottles, form a group of 3, water, recording sheet

• Method:What you have to do-

• 1) Fill in 100ml of water in first bottle• 2) Fill in 150ml in 2nd bottle• 3) Fill in 200ml in 3rd bottle• 4) Blow across the tops of the bottles (note

the differences)• 5) Tap the bottles (what is the difference?)