Factors affecting seed germination: practical
I can plan and set up an investigation into factors affecting seed germination.
- Year 9
Factors affecting seed germination: practical
I can plan and set up an investigation into factors affecting seed germination.
Lesson details
Key learning points
- Some seeds (e.g. cress seeds) will germinate on cotton wool in the right conditions.
- Planning an investigation and writing a method for factors affecting the germination of seeds on cotton wool.
- Deciding which variable to change to become the independent variable and what values to investigate.
- Deciding which variable to measure to conclude on the effect (the dependent variable).
- Deciding which variables to keep the same to ensure a valid conclusion (control variables).
Keywords
Germination - Process where a plant grows from a seed.
Independent variable - Variable that you change or choose to investigate.
Dependent variable - Variable you measure to conclude on the effect of the independent variable.
Control variable - Variables that you keep the same.
Method - Describes how an investigation should be carried out, it has clear and detailed written instructions.
Common misconception
The independent variable is also measured, so this often gets confused with the dependent variable.
Use the definition for the dependent variable that it is being measured for the purpose of seeing what has happened at the end; the effect that the independent variable has had.
Equipment
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which of the following are true about seeds?
Q2.True or false? Seeds contain a food store.
Q3.What is germination?
Q4.What type of reproduction produces seeds?
Q5.Put the following stages of development in the right order.
Q6.What do plants need to grow?
Assessment exit quiz
6 Questions
Q1.Which of these do cress seeds not need to germinate?
Q2.Match the variable to its description.
