Photosynthesis Lab

Here are some ideas for planning experiments for studying plant photosynthesis.

Remember that the simple equation for photosynthesis is:

CO2 + H2O + light --> O2 + glucose

Elodea by Kristian Peters (
Photo of Elodea plant by Kristian Peters (
There are many questions you can ask about photosynthesis, such as:

  • Does light intensity affect the rate of photosynthesis?

  • Does temperature affect the rate?

  • What about levels of carbon dioxide made available to the plant?

For your experiment, you can change what you provide the plant with (the independent variable) and see how this affects their ability to photosynthesize.

Read more about setting up your experiment, what variables you can measure, and what you should expect and look out for.

Hope the explanations here will help you write and plan your next lab report!

Feel free to send me more comments, suggestions and feedback!

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