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Test the difference of plants growing in the dark vs in the light

Suitable For

Grade 3



Time Required

 <2 Weeks



What’s it about?

All green plants, including bean plants, need sunlight or another source of light to make ‘chlorophyll’ to thrive or just to survive. One can say that all living things on earth require sunlight to survive, because without green plants, all life on earth would be unable to survive (all living things feed on plants or animals that have eaten plants). In the following science experiment we will prove that plants need light to survive:

Topics covered

Photosynthesis, Chlorophyll, Phototropism

What will I need?


Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

Plants use light to convert it into energy in a process called ‘photosynthesis’. A plant takes in water and carbon dioxide through their roots and leaves, which is needed to form glucose, a sugar that living organisms break down to produce energy. Using energy from the sun or other light sources, plants rearrange water and carbon dioxide to form sugar. The plants in the sun lit area thrives while the plants in the dark closet does not really grow taller as fast or at all, and looks a lot more unhealthy because of the lack of light.

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