Year 9 - Science
Factors affecting seed germination: practical
Reproduction in plants
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores plant reproduction, including flower structure, pollination, fertilisation, seed formation, and dispersal mechanisms. It highlights the role of insect pollination in food security. Focus is on planning and conducting enquiries, and ensuring reliable observations.
Lesson Summary
You will learn to plan and set up an investigation into factors affecting seed germination.
Key Notes
- 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).
Vocabulary To Learn
- 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 Mistakes To Avoid
- The independent variable is also measured, so this often gets confused with the dependent variable.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key 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.
2. Define this scientific word and use it in context. 'germination'
Process where a plant grows from a seed. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: The independent variable is also measured, so this often gets confused with the dependent variable. Correction: 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.
More Lessons In This Unit
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