Relief Teaching Ideas

Sharing ideas to help make relief teaching fun, enjoyable, and meaningful.

Black Pepper Science Trick

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Here’s another easy but impressive science lesson that’s been around for a long time. Easy to replicate both at home & in the classroom.

All you need is:
Black Pepper
Bowl or plate
Water
Dish Detergent

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Method:
– Pour water into a plate or bowl.
-Shake some pepper onto the water.

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-Dip your finger into the pepper and water. Nothing happens.

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– Dip a different finger in (secretly dip it into some dish detergent before doing the trick).
-Watch as the pepper rushes to the edges of the bowl.

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Explanation:
When you add detergent to water the surface tension of the water is lowered. Water usually beads up (you can show this to students by dropping some water on a coin) but when the surface tension is lowered, the water wants to spread out. As the water spreads out/flattens in the bowl, the pepper that is floating on top of the water is carried to the outer edge of the bowl.

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