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Colour Walk

How well do you know your neighbourhood? What can you see if you explore?

In this activity, students go on an adventure in the schoolyard or around the neighbourhood to do a colourful visual collection.

A natural rainbow is a weather effect caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. In a primary rainbow, the arc is visible to the human eye as red on the outer part and violet on the inner side. 

The range of wavelengths of light that the human eye can see is called "the visible spectrum". This includes the colours of the rainbow. ROYGBIV- Red, Orange, Yellow, Green Blue, Indigo, Violet. Indigo and violet are often described as "Purple".

ColourWavelength Range (nm)
Red620-750
Orange590-620
Yellow570-590
Green495-570
Blue450-495
Violet380-450

Each colour can be explained as a ray of light that is transmitted at a particular level of energy (with a particular wavelength). The shorter wavelength corresponds with greater energy.

NOTE: The range of wavelength for indigo is around 425–450 nm. It's hard for the human eye to distinguish and is usually considered a subset of violet, often combined as "purple".

Objectives

  • Explore local environments, schoolyard & neighbourhood .

  • Search for items in the visible light spectrum of rainbow colours.

  • Record observations of objects in environment in the rainbow spectrum: ROYGBIV

Materials

  • Per Student:
    Rainbow Colour reminder list: Red, Orange, Yellow,Green, Blue, Purple
    Pencil (if recording in writing)
    Coloured pencils or crayons (if drawing to record observations)
    Paper

    Optional: camera or mobile phone

    Teacher Tip: a clipboard or piece of cardboard for each student is a great support for drawing or writing observations on loose paper.

Key Questions

  • Can you name the colours of the rainbow?
  • What colours of the rainbow are you able to locate? Are some colours harder to find? Why might that be?
  • Did you find something that you have never noticed before?
  • Are there items that contain the same colours? Are some colours more common? Rarer?

What To Do

  1. Hand out list, paper and writing and/or drawing pencils.
  2. Go outside to the exploration location.
  3. Have the students observe and record as many items as they can in a given amount of time, in their chosen method.
  4. As a group, discuss the observed items before heading back inside.

Teacher Tip: Before handing out the materials, make sure you have established boundaries with the students. If you are going around the block or neighbourhood, you may want to get an adult helper or older student leaders to come along.

OPTIONAL: create a “Neighbourhood Display” of artwork of observed items, grouped by colour into a rainbow.

Extensions

  • Identify that light is transmitted in waves.
  • What colour of visible light has the shortest wavelength? The longest?
  • What colour of light has the most energy? The lowest energy?
  • Create a "Neighbourhood Display" of artwork of observed items, grouped by colour into a rainbow.
  • Create a "Neighbourhood Display" of photographic observations digitally.
  • For older classes, consider creating an Community Inventory of living organisms observed in rainbow colours: see the Project Wild PDF in Other Resources.

Other Resources

Science World YouTube |Search for Rainbows

Color Matters | Fun Color Matters (sidebar)

Project Wild | Community Science Inventory Methods PDF

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