It's a rainbow world

Science Year 6
This unit is part of Year 6 Science Crime Lab Investigation

Objectives

How did our criminal read the encrypted laptop password that is too high up on the wall to see with the naked eye? And how did they decode it? Have a go at splitting white light into rainbow colours to help you crash through the password code.

Science Objectives
i) Use the idea that light travels in straight lines to explain that objects are seen because they give out or reflect light into the eye.

ii) Explain that we see things because light travels from light sources to our eyes or from light sources to objects and then to our eyes.

Working Scientifically

  1. Plan different types of scientific enquiries to answer questions, including recognising and controlling variables where necessary.
  2. Take measurements, using a range of scientific equipment, with increasing accuracy and precision, taking repeat readings when appropriate.
  3. Record data and results of increasing complexity using scientific diagrams and labels, classification keys, tables, scatter graphs, bar and line graphs.
  4. Report and present findings from enquiries, including conclusions, causal relationships and explanations of and degree of trust in results, in oral and written forms such as displays and other presentations.

You Will Need

Provided Resources

  • Encrypted code and password reminder
  • Investigations and homework resource

Additional resources

  • Magnifying glasses of different strengths (ensure one of them is x2 and the others greater than x4)
  • Prisms
  • Mirrors
  • Bubbles
  • Clear plastic tops

Weblinks
Information about rainbows from bbc.co.uk

Lesson Planning

Teaching

  • Plan and carry out an investigation into the strength of various magnifying lenses.
  • Understand that light can be bent when it is slowed down.
  • Recognise that white light can be split into 7 rainbow colours.

Activities

  1. Investigate magnifying lenses, suggesting which cannot magnify enough in given circumstances.
  2. Explain and demonstrate that light can be bent when it is slowed down.
  3. Split white light into rainbow colours.

Investigation - exploring
Explore split light (finding ‘rainbows’).

Vocabulary
Light, light source, refraction, mirror, magnifying glass, absorb, direct/ direction, transparent, opaque, translucent, straight, bend, rainbow