Science experiments · lesson 2 of 30 · free

Density tower: honey, water and oil — Science experiments for kids

You need: a tall clear glass, honey, water with a drop of food colour, cooking oil and a spoon. What happens: the liquids do not mix — they settle as three layers, honey at the bottom, coloured water in the middle and oil on top. Why: each liquid has a different density (how heavy it is for its size). Honey is the densest, so it sinks; oil is the least dense, so it floats. A cork stops on top of the oil and a coin sinks right to the bottom.

▶ Watch how it works

Got it? Practise ↓

What you do

Heaviest for its size sinks — “liquids settle in layers from most dense (bottom) to least dense (top)”

  1. 1. Pour honey slowly into the glass to fill about a quarter.
  2. 2. Pour coloured water gently down the side of the glass.
  3. 3. Pour the cooking oil gently on top and watch the layers settle.
  4. 4. Gently drop in a cork and a coin, see where each stops, and wipe up oil spills.

Use it for: Science lessons on density, liquids and floating; a colourful kitchen science experiment for kids.

Worked example: 🍯 Why does honey sink to the bottom of the glass? → it is the densest

  1. Honey packs the most mass into each spoonful.
  2. It is the densest of the three liquids, so it sinks.

Check: Shake oil and water together and wait — they separate again ✓

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✏️ Practice

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🏁 Lesson 2 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

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🖨️ Density Tower Experiment Worksheet

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