science education

Exploring Nature Science Education Resource:

Life Science, Earth Science, and Physical Science Resources for K-12

Variation of Traits - Plant Investigation

Variation of Traits - Plant Investigation

Essential Questions:

1. Why does one organism of the same species look different from another?

2. How can an organism’s characteristics be affected by their environment?


Goals: Students are going to use evidence to support the explanation that traits can be influenced by the environment.


  • 3-5 empty, peeled 2-liter bottles with the tops cut off
  • small rocks to cover the bottom of each planter for drainage
  • scissor
  • scotch tape
  • pitcher with water
  • box in which the planter can fit (or a closet or dark cabinet in which the planter can fit)
  • potting soil
  • green bean seeds (fast growing seeds recommended)

Students will take three plants that are about the same size and expose them to different environmental factors to see if they grow the same way. You start 3-5 planters in case not all seeds grow. You only need three for the experiment.

1. Cover the bottom of each planter with small rocks and add 6-8 inches of potting soil.

2. Plant one seed in each planter and water them the same amount.

3. Expose them to the same warm temperature and sunlight. When the plants are about 6 inches tall and have several leaves, the experiment can begin.

4. Keep two of the planters in the sunlight and place one under a box (or in a dark closet or drawer so it gets no sunlight).

5. Label Plant 1 – the control plant receiving water and sunlight.
    Label Plant 2 – the plant that gets sunlight, but no water.
    Label Plant 3 – The plant that gets watered every day, but receives no sunlight.

6. Note the differences in the plants after 3 days, 6 days, 9 days, and 12 days. 

Observation and Discussion: Can you see any differences between the plants? Are the differences inherited from their parent plants or affected by their environment - sunlight, temperature, water? Is this the result you expected?

Citing Research References

When you research information you must cite the reference. Citing for websites is different from citing from books, magazines and periodicals. The style of citing shown here is from the MLA Style Citations (Modern Language Association).

When citing a WEBSITE the general format is as follows.
Author Last Name, First Name(s). "Title: Subtitle of Part of Web Page, if appropriate." Title: Subtitle: Section of Page if appropriate. Sponsoring/Publishing Agency, If Given. Additional significant descriptive information. Date of Electronic Publication or other Date, such as Last Updated. Day Month Year of access < URL >.

Here is an example of citing this page:

Amsel, Sheri. "Variation of Traits - Plant Investigation" Exploring Nature Educational Resource ©2005-2019. January 22, 2019
< > has more than 2,000 illustrated animals. Read about them, color them, label them, learn to draw them.

cheetah, tiger, panda, fox, bear, cougar