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      Changing shape: plan and do

      Lesson details

      Learning outcome

      I can plan and carry out a test to try to change the shape of different materials in different ways.

      Key learning points

      1. Materials can be squashed by pressing on them to change their shape.
      2. Materials can be bent by pushing or pulling a straight shape into a curve or an angle.
      3. Materials can be twisted by holding each end and turning them in opposite directions.
      4. Materials can be stretched by pulling them to change their shape.
      5. Scientists can plan and test how squashing, bending, twisting and stretching can change the shape of some materials.

      Keywords

      • Squash - You can squash something by squeezing or pressing on it.

      • Bend - To bend something is to curve it so that it is not straight.

      • Twist - When you twist something, you hold each end and turn them in opposite directions.

      • Stretch - When you stretch something, you pull it to change its shape.

      • Material - A material is what an object is made from. An object can be made from more than one material.

      Common misconception

      Children may think that all objects that can be squashed, bent, twisted or stretched may return to their previous shape (elasticity).

      Opportunities to explore the impact of squashing, bending, twisting and stretching different materials.

      Teacher tip

      Make sure that the children understand that they are testing the materials that objects are made from in Task B, rather than the objects themselves.

      Equipment

      Dough, different materials to test, e.g. a stone, a sponge, a sock, dough, paper, a rubber glove. Ensure you have a variety of materials including some that keep their new shape after being tested.

      Content guidance

      Exploration of objects

      Supervision

      Adult supervision recommended

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Why is wood a suitable material for making a chair?

      Wood is from trees.
      Correct answer: Wood is not bendy.
      Wood is not waterproof.

      Q2.
      Which of these is a property of materials?

      gloves
      wool
      Correct answer: stretchy

      Q3.
      What does stretchy mean?

      A material that is stretchy does not allow water to pass through it.
      Correct answer: A material that is stretchy can be pulled to make it longer.
      A material that is stretchy does not allow light to pass through it.

      Q4.
      Which of these objects is made from a stretchy material?

      a book
      Correct answer: a hair tie
      a bin

      Q5.
      Which of these objects should be made from a stretchy material?

      Correct answer: a swimming costume
      a table
      a glass

      Q6.
      What would scientists need in order to test materials to find out if they are stretchy?

      a torch
      Correct answer: a ruler
      a jug of water

      6 Questions

      Q1.
      Which of these photographs shows dough that has been squashed?

      dough 1
      dough 2
      Correct answer: dough 3

      Q2.
      True or false? When we bend a material, we press it to make it thinner and flatter.

      An image in a quiz
      true
      Correct answer: false

      Q3.
      Which of these photographs shows dough that has been twisted?

      Correct answer: dough 1
      dough 2
      dough 3

      Q4.
      What do we do when we stretch something?

      We hold the ends of it and turn them in opposite directions lots of times.
      Correct answer: We can pull it to make it longer or change its shape.
      We push or pull it to add a curve.

      Q5.
      Match each action to the correct description.

      Correct Answer:twist,Hold the ends and turn them in opposite directions lots of times.
      Correct Answer:stretch,Pull it to change its shape.
      Correct Answer:squash,Press on it to make it flatter and thinner.
      Correct Answer:bend,Put a curve in it so it is not straight.

      Q6.
      What do scientists do to find out which materials change shape?

      Correct answer: a test
      a graph
      a table

      To help you plan your 2 science lesson on: Changing shape: plan and do, download all teaching resources for free and adapt to suit your pupils' needs...