| Learn about: waves, vibration, and physics |
Marbles are used to show how vibrations “carry” objects along. Materials: 6 rubber bands; 10 marbles of the same size (larger ones work better); 5 jumbo paper clips; clear tape Procedure: 1. Link the rubber bands together with the paper clips to make a long "string" of rubber bands and clips. 2. Place a marble on either side of the first paper clip and tape the marbles together with the paper clip in between to secure the marbles. Repeat this with each paper clip. 3. Hold each end of the "string" of rubber bands and stretch it out across a table or floor. Move one end back and forth, while holding the other end still. What happens? Try moving the end faster or slower. What happens? Does the pattern change? Try moving one end up and down. What happens? Now, explore! Try adding more rubber bands and marble sets. What happens? What patterns of movement can you make? How many different types of waves can you make? What happens when both students move their ends at the same time?
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