Super Lemon Suds!

- Science fun, with a little cleaning thrown in! :) This simple science idea, showing the chemical reaction that occurs when you mix citric acid with bicarb soda, has the added fun of bubbles! Materials: -Clear container or cup -Measuring spoon - Spoon or stirrer (I used a chopstick!) - Liquid dish soap - Bicarb soda - Lemon cut in half Method: 1. Put about 1 tsp of bicarb soda in cup. 2. Stir in about 1 tsp of dish soap. 3. Squeeze lemon juice into cup & give it a stir. 4. Watch the bubbles form & rise up! Explanation: When you mix citric acid (the lemon juice) with bicarb soda a chemical reaction occurs, creating carbon dioxide gas & water. The gas is seen as bubbles but when you add the dish soap it creates even more bubbles. Experiment: Students could test out what happens with different brands

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Black Pepper Science Trick

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 Method: - Pour water into a plate or bowl. -Shake some pepper onto the water. -Dip your finger into the pepper and water. Nothing happens. - 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. 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

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Amazing Balancing Can

This science trick is so simple, but so much fun. It's also easy for students to replicate at home. Equipment: -Two empty 375ml cans -Approx 100ml of water Method: -Secretly pour about 100mls of water into one can. -Have a student try to balance the other empty can tilted on its bottom rim. It is impossible. -Then amaze them, by easily balancing your ‘magic’ can on its bottom rim (they don’t need to know it has water in it). Explanation: It works because the water adds weight to the bottom of the can, changing its centre of gravity and allowing it to balance in otherwise impossible ways.