Sheridan – Plants and Colors of Light

Teacher: Sheridan (


Use this link to access the online lab:


In this experiment, you will test which colors of light help plants grow best for three different common crops: Radishes, Spinach, and Lettuce.

Follow these steps for success in lab:

  1. Have a google doc OR a notebook page ready to go so you can write down your thoughts and answer the questions.
  2. Play around with the online simulator BEFORE beginning the lab to get a feel for the controls.
  3. The journal feature in the simulation is cool, but clicking save will not actually save your work, so please enter question answers on your google doc or your notebook page.
  4. Share google doc pages with me at or have your parents/ guardians sent me a picture of your notebook page to the same email.
  5. Once you select a vegetable and your two light colors, use the On/Off switch to begin the experiment. You will not be able to make any changes until the experiment is done once this switch is flipped.


When you’re ready to begin, answer the following questions as you go in your google doc or notebook:

  1. Make a hypothesis (a prediction): Which color of light is going to help the plants grow best/ tallest?
  2. Create a data table to record your comparisons. A model data table is attached to this assignment for reference. (you can create tables in google docs by using “Insert –> table” and selecting the size you want).  You may want to make a separate table for each plant type!
  3. After you have compared each color, explain your results. What did you find out? Which color gave the most height? Did that color work best for all three plants?
  4. White light from the sun is made of all of the colors of the light spectrum: red, orange, yellow, green, blue, and violet. Since we grow our crops under sunlight, how do you think this will affect their growth? Explain your thoughts using evidence from your lab.

When you’re finished, be sure to share your work with Mr. Sheridan!


Files for this Assignment:

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