S2.1.3 For the adult
A fair test with plants
How can I test what a plant needs?
What this chapter teaches
In a fair test you change only one thing and keep everything else the same. A few seeds in each cup stop one weak seed from spoiling the result. Measure height the same way on the same days and write it in a table.
Three questions to ask
There is no one right wording. Listen for the idea.
- You want to know if soil matters to a seedling. What will you change, and what will you keep the same?
- Why is one seed in each cup not enough?
- How does a table help you see which seedlings grew more?
After the chapter, the learner can
- Plan a test that changes only one thing
- Record plant height in centimetres in a table
What they copy into their notebook
A fair test changes only one thing. Keep everything else the same. Use a few seeds in each cup. Measure height in cm, soil to tip, on the same days. Write it in a table.