This activity pack is full of activities on the theme of colour. Find out how to make a rainbow, how a caterpillar avoids being eaten, how cabbages can be used as magic ink and why red plus green equals yellow!
Activity 3 is an easy way of spiltting white light into its different colours. White light travelling in a straight line appears colourless, but there’s more to light than meets the eye. White light is actually made up of lots of different colours. All the colours of the rainbow, in fact. You have to split white light to see the different colours, and this is exactly what you have done! Raindrops also split light. When sunlight shines though raindrops, the different coloured rays spread out at different angles, and you see a curved band of colours across the sky, which you know as a rainbow. The colour of light depends on how long its waves are, so we see different colours because each colour has a different wavelength. In other words, when we see colours, we are really seeing light of different wavelengths. Red light has the longest waves, orange is slightly shorter, and so on. Violet has the shortest wavelengths
Activity 6 involves investigating whether an ice cube will melt faster on different coloured materials. This provides an opportunity to learn about reversible change as well as the suitability of materials. Linked to this activity, children could perhaps research why certain professions wear clothes made in different colours.
Activity 14 is an interesting investigation looking at whether plants will grow towards different coloured lights. It could be used to teach children about photosynthesis if they are ready for this. Equally, it provides a great opportunity for children to plan a fair test.