Water the Plants! Add Sugar? Would Adding Sugar to the Water Increase the Growth of Plants?

Water the Plants! Add Sugar? Would Adding Sugar to the Water Increase the Growth of Plants?

To determine if adding sugar to the water would increase the growth of plants?

Questions for Background Research:

  • What gives green plants their green color?
  • How do green plants obtain their food?
  • What is photosynthesis?
  • What is chlorophyll?
  • Are all sugars the same?
  • How do plants store sugar?
  • What are some of the methods being used to increase plant growth?
  • What is a control in an experiment?
  • Of what value is a control in this experiment?

On the information level, this experiment serves to acquaint students with basic information on the basic processes of the growth of green plants. Plants produce their own food by the process known as photosynthesis. The word photo synthesis when broken down into its component syllables yields photo meaning light and synthesis meaning putting together and thereby informs us that plants require light in order to produce their own food. Plants trap the sunlight and produce carbohydrates (sugars and starches) which in turn are converted into energy. It would seem logical to assume that were we to add sugar such as glucose to the water which plants require , we would increase the growth of the plant . Logical, yes? Will it work? Let us find out!

This science fair experiment also serves to acquaint students with the essential processes of sciencing such as the importance of the use of a control, of identifying dependent and independent variables, of data collection, of pictorial and or graphic presentation of data and of being able to make better judgments as to the validity and reliability of their findings. They take on the role of scientists and in the process they learn to act as one.

  • six geranium plants of approximately the same size
  • sugar
  • water
  • a beaker
  • a graduated cylinder
  • a table spoon
  • a metric ruler
  • paper towels
  • a camera (if you wish to take photos of the procedure and the results).
  • These are all readily available from the local gardener, 

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