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Chapter 3: Thermal Conductivity of Metals

Have you ever touched something?

That became hot enough to burn you only moments after it was cool to the touch? This can happen when you stir a pot of soup on the stove with a metal spoon or roast marshmallows over a fire with a metal rod. So what explains why it’s a better idea to stir your soup with a wooden spoon and roast your marshmallows with a wooden stick? Objects made of metal can quickly conduct unwanted heat right up to our hands!

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Grade 4: Chemical Reaction | Water Volcano

Have you ever see Water Volcano?

Water Volcano. The mixing of the vinegar and baking soda produce a volcano like foam. The answer? The mixing of the vinegar and baking soda produce acid-base reactant. The reaction creates carbon dioxide gas that bubbles up from the mixture. This trick is the perfect rainy day activity for all ages (adults too!). The possibilities are endless – so grab a glass of water and start making magic!

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Super Cool Lava Lamp | Polarity and Non-polarity | Physics

Have you ever seen a lava lamp?

This lava lamp experiment is super cool! Your kids will love exploring colored water and oil, but a surprise ingredient will make this science activity even more exciting! It’s always a hit with the kids. So grab a few household supplies and give this lava lamp science activity a try!