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      Lesson details

      Learning outcome

      I can describe the properties and uses of smart materials and give specific examples.

      Key learning points

      1. Smart materials react to a stimuli.
      2. Stimuli can be environmental such as light, temperature, humidity, or when manipulated or put under pressure.
      3. Smart materials react by changing colour, shape or conductivity.

      Keywords

      • Stimulus/stimuli - (singular/plural) something that encourages activity or change

      • Physical property - the characteristics of a material, such as appearance and features

      • Working property - the way in which a material responds to an external force or certain environment; also referred to as mechanical properties

      • Function - the purpose of the product

      • Form - a particular shape, linked to aesthetics

      Common misconception

      Smart materials are only for fun products like colour changing mugs!

      Smart materials give designers and engineers exciting possibilities when developing new products. Possibilities often focus on function and/or form. For example, thermochromic materials can be used to indicate a temperature and warn users of danger.

      Teacher tip

      Collect together as many examples as you can find, including: colour changing mugs, umbrellas, spoons, glasses that change to sunglasses, memory foam pillows etc.

      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.
      Smart materials ...

      are expensive.
      Correct answer: can respond to changes around them.
      can only be used once.
      are always colourful.

      Q2.
      Which of these might a smart material respond to?

      heat
      light
      pressure
      Correct answer: all of the above

      Q3.
      What is an example of a product that might use a smart material?

      a plastic bag
      a wooden chair
      Correct answer: sunglasses that change shade in sunlight
      a wool sweater

      Q4.
      Why are smart materials useful?

      Correct answer: they can improve product performance
      they are always cheap to produce
      they don’t need any aesthetic design
      they don’t wear out

      Q5.
      These glasses have turned into sunglasses. Which stimulus have they responded to?

      An image in a quiz
      heat
      pressure
      electricity
      Correct answer: sunlight

      Q6.
      What happens when this spoon is placed in hot water?

      An image in a quiz
      Correct Answer: changes colour, colour changes, it changes colour, the colour changes

      6 Questions

      Q1.
      Sort the physical/working properties and stimuli:

      Correct Answer:temperature,stimuli
      Correct Answer:colour,physical properties
      Correct Answer:electrical conductivity,working properties
      Correct Answer:pressure,stimuli
      Correct Answer:moisture,stimuli
      Correct Answer:opacity,physical properties

      Q2.
      Match the smart material to the stimuli that it responds to:

      Correct Answer:hydrochromic,water/mositure
      Correct Answer:photochromic,sunlight
      Correct Answer:thermochromic,heat
      Correct Answer:shape memory alloy,heat
      Correct Answer:piezoelectric,pressure
      Correct Answer:bioconcrete,water/moisture

      Q3.
      Glasses (for vision) that are accidentally sat on, pop back to their original shape. Which smart material is this an example of?

      thermochromic
      hydrochromic
      piezoelectric
      Correct answer: shape memory alloy
      bioconcrete

      Q4.
      Identify the products that use smart materials to improve their function:

      Correct answer: stents
      novelty umbrellas
      Correct answer: colour changing baby spoons
      Correct answer: glasses that lenses change to sunglasses
      Correct answer: colour changing bandages that show if a wound has become infected

      Q5.
      Some nappies use a smart material to identify that the nappy needs changing. Which smart material is this an example of?

      An image in a quiz
      photochromic
      thermochromic
      polymorph
      Correct answer: hydrochromic

      Q6.
      This smart material uses bacteria that react with water to 'heal' itself by producing limestone to fill any micro cracks that appear. Which smart material is it?

      polymorph
      hydrochromic
      Correct answer: bioconcrete
      shape memory alloy
      photochromic

      To help you plan your 11 design and technology lesson on: Smart materials, download all teaching resources for free and adapt to suit your pupils' needs...