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Let's investigate

Science Year 3
This unit is part of Year 3 Science Light and Shadows

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Objectives

Add a screen to your puppet theatre then use it to freely investigate how moving the light source changes the shadow. Conduct a fair test to find the precise relationship between the distance of the torch and the size of the shadow.

Science Objectives
i) Recognise that shadows are formed when the light from a light source is blocked by an opaque object.

ii) Find patterns in the way that the size of shadows change.

Working Scientifically

  1. Set up simple practical enquiries and comparative and fair tests.
  2. Make systematic and careful observations and, where appropriate, take accurate measurements using standard units.
  3. Record findings using simple scientific language and tables.

Other Curriculum Areas
Design and Technology

  • Build and apply a repertoire of knowledge, understanding and skills in order to design and make high-quality prototypes and products for a wide range of users.

Extended Writing Opportunities
Non-chronological report: Write a report about all that you have discovered about shadows for BBC Bitesize.

Lesson Planning

Teaching

  • Actively investigate how shadows change as the light source is moved.
  • Take measurements and look for patterns in data to answer scientific questions.

Activities

  1. Make and attach a tissue paper screen to their puppet theatre in groups.
  2. Freely explore the effect of moving the light source on shadows in their theatre.
  3. Look for patterns and try to answer questions.
  4. Take accurate measurements of the length of shadows whilst controlling the distance of the light source.
  5. Observe a demonstration of light travelling in straight lines to help understand and explain shadow data.

Investigation - fair testing/pattern seeking
Investigate the effect of moving the light source on the size of shadows.

Vocabulary
Light source, opaque, translucent, transparent, shadow, measure

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