Does The Color Affect Plant Growth?

If I expose a plant to blue light, then it will grow faser then red, green, yellow, or clear light

• 1 Green cellophane

• 1 Blue cellophane

• 1 Clear cellophane

• 1 Yellow cellophane

• 1 Red cellophane

• 1 Scissor

• 2 glue or tape

• 1 Potting soil

• 5 Planting containers (smaller than 1’ by 1’)

• 1 bag of Bean seeds

• 5 Cardboard boxes

• 5 Rulers

• 1 Measuring cup

• 1 Journal log

• 1 Camera

1. Gather material

2. Place planting containers side by side

3. Fill each of the plastic planting containers 3⁄4 full with potting soil and plant each seed 1⁄2

inch deep in the soil.

4. Place the plastic planting containers inside each box

5. Label each box with the different colors

6. You should now have five boxes, four of them covered with red, blue, yellow and green

cellophane and one without cellophane.

7. The box with no cellophane will get no colored light and will be used as the control.

8. Place the boxes in a designated area that gets plenty of sunlight during the day.

9. Water each plant with a 1⁄4 cup distilled water each day, watering at night so the plants

are not exposed to light other than the light filtered through the cellophane.

10. Continue watering plants for four to six weeks

11. Repeat all steps for a total 3 trials

Independent Variable: Color of Light

Dependent Variable: Speed of Growth

Constant:Seeds, Plants, Plant Containers, and boxes

Control Variable:Water, soil, temperature, day/night time.

Does color of light affect plant growth? My hypothesis was plants under blue light would grow faster than those on red, green, yellow, and clear. I based my hypothesis on the idea that the effect of blue light on plants is directly related to chlorophyll production. Plants that receive plenty of blue light will have strong, healthy stems and leaves. The results show that this hypothesis is supported. The plant growth under the blue light was bigger. Because of the result of this experiment, I wonder if these results may change under a different season. If I were to repeat this science experiment again, I would like to do it in another season of the year.

The purpose of this experiment was to find out if color of light affected the growth of a plant.

Throughout this project the process of photosynthesis was used to understand how the process of air-breathing is needed for plants to live.

Epicgardening.com explains that Photosynthesis is the process by which plants use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things. Some of that energy is used to break down the water, that the plant gets from the soil, into hydrogen and oxygen. The oxygen goes into the air and the hydrogen stays in the plant to help make sugar and starches.

I conducted this experiment, and determined that with plants exposed to blue light would grow faster than with red, yellow, green, and clear light.

Each day I watered plants at 7PM to make sure plants were not exposed to sunlight and the experiment was not affected with the results. I used 1⁄4 of a cup every day, giving the plants the same amount of water every time.

My data shows that BLUE light was the first plant to start plant growth on day 4. Then, YELLOW light was the second, RED Light was the third, CLEAR light was the 4th and GREEN was the 5th and last plant to grow. In conclusion, it was proven that light does affect plant growth and that plant growth happens faster under blue light. These findings of the experiment can be found in real life because anyone else can also do this experiment at any given time at home.

This experiment can be done by others as well. It is important to follow all the steps I provided and never expose the plant under the colored transparencies to sunlight when adding the water because this can change the data and findings of the project. I watered the plants everyday at 7:00 PM to make sure it was safe. I recommend a timer as a reminder since it worked for me.

Journal of Physics: Conference Series. The effect of coloured light on Ipomoea purpurea growth. https://iopscience.iop.org/article/10.1088/1742-6596/182/1/012018/pdf

Konica Minolta. Can Colored Lights Affect How Plants Grow? https://sensing.konicaminolta.us/

us/blog/can-colored-lights-affect-how-plants-grow/

Mini Garden Guide. Grow and Sustain. Does the Color of Light Affect Plant Growth? Heck Yes... and Here's Why... - Mini Garden Guide

Spec Grade Led. How the Lightning Color Spectrum Affects Plant Growth. https://specgradeled.com/news/how-the-lighting-color-spectrum-affects-plant-growth/List the different sources used while conducting the experiment.

I would like to thank my mom, my grandmother, and my brothers for helping me through this science project. We had a lot of fun seeing how the plants would grow a little everyday. I am happy we did this project as a family and we were able to enjoy this time together.