Materials needed for Autumn Colours Plant ScienceRed and Yellow Food Colouring White Carnation Flowers Water Pippette or dropper White Paper Towel 3 vases
Learning objectives for Autumn Colours Plant Science
- Learn about mixing colours – red and yellow
- Investigate that plants need water and watch it in action
Preparation needed aheadSet up 3 vases with water in of equal measures. Place these on white paper so that it is easier to see the colours.
Autumn Colours Plant ScienceUsing the pippette or dropper into vase 1 have the child add red food colouring – the more the better in the case of this situation, no one (apart from the plant) will be drinking the mixture. Into the 3rd vase add yellow food colouring again making a strong vibrant colour. You can get your child to test the colour by dipping the white paper towel into the water to see that the colour is strong enough. Using the pippette have your child add first yellow until you have a strong yellow colour to the water. Once there is a strong yellow very gradually have your child add in drops of red talking about the colour that is forming. When you have a bright orange it’s time to add in the carnation flowers. Leave the plants to draw up the water through the stems for 48 – 72 hours – it does take a while to see but you can go back and observe the flowers regularly to see the change in them.
The Science behind the experimentThere are 2 areas of science in the experiment the first most obvious is that of colour mixing – red, yellow and blue are primary colours all other colours can be made up of mixing these 3 colours, red + yellow = orange, red + blue = purple and blue + yellow = green. The use of carnations to see the colours is exploring transpiration. Transpiration is the process where water is moved in a plant, water is absorbed by the roots into the stems, vessels like veins called Xylem are found in the stem and take the water up to the leaves and flowers, these vessels continue into the petals of the flower and them small holes – stomata in the leaves and petals let the water evaporate when in the sun shine. Transpiration is important as at the same time that water is brought through the plant minerals are dissolved in this water and the movement of the water lets them go to where they are needed in the plant. The pigments of food colouring that are dissolved in the water act the same as those dissolved minerals but as they are not needed in the plant they follow the full route of the water from entering the stem to leaving the petals of the flower via the stomata in the process colouring the xylem vessels that they are flowing through.
This weeks #playfulpreschool Autumn Colours learning activitiesVisit these other fabulous sites for their learning activities based on the theme autumn colours
About the author:Darla Hutson has taught children ages infant-7 in a licensed group childcare/preschool home for the past 30 years. Darla has a passion for creating environments and activities that help facilitate play and learning for young children. She writes primarily at The Preschool Toolbox but you will also find activities for kids, teachers, and families with young children at: Wikki Stixand Hubpages.
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Cerys is a marine biologist, environmental educator, teacher, mum, and home educator from the UK. She loves getting creative, whether it is with simple and easy crafts and ideas, activities to make learning fun, or delicious recipes that you and your kids can cook together you'll find them all shared here on Rainy Day Mum.