The effect of light intensity on rate of photosynthesis in algae: plan
I can plan an investigation into the effect of light intensity on the rate of photosynthesis in algae.
The effect of light intensity on rate of photosynthesis in algae: plan
I can plan an investigation into the effect of light intensity on the rate of photosynthesis in algae.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Algae are living organisms that photosynthesise in the light, carbon dioxide is a reactant.
- Planning an investigation into the effect of light intensity on the rate of photosynthesis in algae.
- Identifying the independent variable (light intensity) and planning how to vary it.
- Identifying factors that should be controlled and how they could be (e.g. temperature).
- Planning a method to measure the dependent variable (colour change of indicator).
Keywords
Rate - a measure of how much change occurs per unit of time
Light intensity - the amount of light reaching a given surface area in a period of time
Hypothesis - an idea, for example an idea about an outcome of an experiment, based on observations and understanding
Variable - a factor that can be changed during an experiment
Control variable - a factor that is kept the same during an experiment
Common misconception
Some pupils do not consider how to control variables carefully enough. This means results are likely to be less accurate and so do not provide conclusions that can be used to support a hypothesis.
Each type of variable is considered during the lesson and repeated to help pupils to understand the differences between each type of variable.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
Loading...