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Particular |
Content |
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Material Required |
● A glass ● A pencil ● Your hand |
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Tags (SEO) |
Balance & Center of Gravity |
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Steps |
Step 1: Fill the Glass with Water 💧● Fill a clear glass about ¾ full with water. Step 2: Place the Pencil in the Water ✏️● Gently place the pencil into the glass. ● Observe whether it floats or sinks. ● Most pencils will float because they are made of wood, which is less dense than water. Step 3: Make the Pencil Float Differently 🌀● Try pressing the pencil down and releasing it. ● Notice how it bobs back up to the surface. ● If the pencil leans sideways, try adjusting it carefully. Step 4: Try the Saltwater Variation 🧂● Remove the pencil and add 2-3 tablespoons of salt to the water. ● Stir until the salt dissolves completely. ● Place the pencil back into the glass. ● Does it float higher now?
Scientific Explanation:● Buoyancy: The pencil floats because it is less dense than water. ● Water Displacement: The water pushes up against the pencil, keeping it afloat. ● Saltwater Effect: Adding salt increases the water’s density, making the pencil float even higher. |