Activity 5.1: Vibrating Ruler. Method: 1. Place one end of a ruler on a desk and hold it down firmly. 2. Let the other end hang over the edge. 3. Pull the free end down and release it. 4. Observe what happens and listen to the sound.

Here are the materials for the activity: 4. The materials needed for Activity 5.1 are: Ruler Desk or table Rubber bands of different thicknesses Empty tissue box or 2 litres container Ruler, Desk or table, Rubber bands of different thicknesses, Empty tissue box or 2 litres container 3 done, 2 left today. You're making progress.