Collect the objects mentioned in the table given below. Spin and observe them. Then, complete the table.
| Objects | I observe | I wonder | I think |
|---|---|---|---|
| Coin | As it slows down, it begins to shake | Why does it start to shake as it slows down? | |
| Bangle | As time passes, the sound... | ||
| Pencil | |||
| Piece of Stone | |||
| Wooden Spinner (Top) | |||
| Eraser |
When different objects are spun, various observations can be made: A coin spins smoothly at first but begins to shake as it slows down. A bangle spins and produces sound that changes as time passes. A pencil may not spin as well due to its elongated shape. A piece of stone may not spin properly due to irregular shape. A wooden spinner (top) spins well and remains upright. An eraser does not spin properly due to its shape and lack of balance point.
Explanation
This activity encourages students to observe spinning behaviour of different objects. The chapter provides a table for students to record their observations under 'I observe', 'I wonder', and 'I think' columns. Students discover that objects with symmetrical shapes and central balance points spin better than irregular objects. The shaking of a slowing coin is mentioned as an example observation.