Cup and Rubber Band

1. Using your cup and rubber band, pluck the rubber band lightly.
What do you see and hear?

2. Pluck the rubber band hard this time. What do you see and hear?

Ruler and Desk

Keep the ruler in one position.

1. Pluck the ruler hard. What do you see and hear?

2. Pluck the ruler lightly. What do you see and hear?