Layered Liquids

Supplies

• Clear glass or jar (transparent is important)

• Honey or golden syrup

• Dishwashing liquid

• Water

• Cooking oil

• Food colouring (for the water)

• Small jug or spoon for pouring

Safety First

• This is a no-heat experiment, suitable for children

• Staff should control the pouring order for best results

• Encourage slow, careful pouring to avoid mixing

• Spills can be slippery — wipe up immediately

Steps

1. Place the clear glass on a flat surface where all children can see.

2. Slowly pour honey or golden syrup into the glass (this goes first as it is the heaviest).

3. Gently add dishwashing liquid, pouring it down the side of the glass.

4. In a separate cup, mix food colouring into the water, then carefully pour it on top of the dishwashing liquid.

5. Slowly add cooking oil as the final layer.

6. Allow the glass to sit still and observe the layers forming.

What to Observe

• The liquids settle into distinct layers

• Heavier liquids sink, lighter liquids float

• Oil stays on top and does not mix with water

Explain It Simply to Children

“Each liquid has a different weight, even though they all look like liquids. The heavier ones sink to the bottom, and the lighter ones float on top.”

Discussion Prompts

• Which liquid do you think is the heaviest?

• Why do you think the oil floats?

• What do you think would happen if we stirred it?