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Liquid Density Layers

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Liquid Density Layers

Explore how liquids can settle into layers. Read the mini story and answer each question. Density means how much matter is packed into a space: a denser liquid can sit beneath a less dense liquid.

The Layered Cup

Nikau made a pretend ocean in a clear cup. She carefully poured in treacle, water, and oil. The liquids settled into three bands. Treacle was at the bottom, water was in the middle, and oil was at the top. The liquids did not all mix into one colour.

1.According to the story, which liquid is at the very bottom?
  • Oil
  • Water
  • Treacle
2.Which liquid is at the very top of the cup?
3.Put the liquids in order from bottom to top: water, oil, treacle.
4.What does density help explain in this cup?
  • Why some liquids sit lower than others
  • Why the cup is clear
  • Why oil is yellow
5.True or false: In Nikau's cup, the less dense oil floats above the water.
TrueFalse
6.A denser liquid is more likely to beneath a less dense liquid.
7.Imagine you gently pour oil onto water. What might you see after a short wait?
8.Nikau stirs the cup with a spoon. Will the three clear layers stay perfectly separate while she stirs? Explain briefly.
9.Draw a clear cup with three bands. Label the top, middle, and bottom liquids using Nikau's story.
10.A bottle of salad dressing separates into an oil layer and a watery layer when left still. How is this like Nikau's cup?

2 printable pages

  • Liquid Density Layers, page 1 of 2: The Layered Cup

    Page 1

  • Liquid Density Layers, page 2 of 2: 5. True or false: In Nikau's cup, the less dense oil floats above the water.

    Page 2

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