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Year 3 - Science

Physical properties of rocks: permeability

Rocks and soils

Unit Summary

This unit covers comparing and grouping rocks based on appearance and physical properties, understanding fossil formation, and recognising that soils are made from rocks and organic matter. It involves setting up practical enquiries, making observations, and using evidence to answer questions.

Lesson Summary

You will learn to compare and group different rocks by testing their permeability.

Key Notes

  • Geologists test different rocks for permeability. This tells them which rocks allow liquid, e.g. water, to pass through.
  • Permeable rocks, such as sandstone, let water pass through them.
  • Impermeable rocks, such as marble, do not let water pass through them.
  • Rocks can be compared and grouped by their permeability.

Vocabulary To Learn

  • permeability: Permeability is the ability of a substance to allow liquids like water to pass through it.
  • rock: Rock is a solid material that occurs naturally in Earth.
  • permeable: If a material is permeable it will allow liquids and gases to go through it.
  • impermeable: If a substance is impermeable, it will not allow water to pass through it.

Common Mistakes To Avoid

  • Children can become confused with the word permanent and permeable.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

Geologists test different rocks for permeability. This tells them which rocks allow liquid, e.g. water, to pass through. Permeable rocks, such as sandstone, let water pass through them.

2. Define this scientific word and use it in context. 'permeability'

Permeability is the ability of a substance to allow liquids like water to pass through it. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Children can become confused with the word permanent and permeable. Correction: Be clear on your definition of permeable, perhaps use some actions to help them remember. Clear up at the start that although permeable sounds rather like permanent it is completely different and explain the difference using examples.

More Lessons In This Unit

Browse all guides in the Year 3 Science guide library.