Science project

Bubbly Plants

All living things need water to survive, but not all water is the same. This experiment aims to discover if different types of water effect the germination of seeds and growth of plants.

Research Questions:

How will tap water, distilled water, and seltzer water affect the germination and the growth of radish seeds? Which type of water will generate the most enhanced growth?

Regular tap water contains chemical contaminants that could hinder the growth of seeds and plants. Distilled water has been purified and thus lacks the chemicals and minerals of tap water. Seltzer water is water in which carbon dioxide gas has been dissolved. The carbon dioxide reacts with the water to produce carbonic acid, slightly raising the pH balance.

The independent variable in this project is the type of water, and the dependent variable is the plant’s rate of growth based on the water fed to it. The constants include the type of seeds, the soil, the conditions and the amount of water.


  • Three small, plastic pots
  • One small bag of potting soil
  • One packet common seeds (ex. radish, tomato, poppy, etc.)
  • One bottle distilled water
  • One bottle seltzer water
  • Measuring cup
  • Ruler

Experimental Procedure:

  1. Label each pot with the water type that will be used in it.
  2. Fill pots with potting soil to the same level on each.
  3. Plant 5-10 seeds in each pot, following the directions on the packet.
  4. Soak the soil in each pot with the same number of ounces of the three types of water.
  5. Store pots with access to the sun.
  6. Water at the same time each day with equal amounts.
  7. When shoots appear in one of the pots, start recording the dates and growth for each type of water.
  8. At the end of a specified period (ex. two weeks), form a conclusion about which water.

A chart can record the daily data:



Tap Water

(height in mm)

Distilled Water

(height in mm)


Seltzer Water

(height in mm)

Mon., 12/19



Tues., 12/20








The chart can be translated into a simple graph:


Terms/Concepts: Germination;  Carbonation; Distillation


  1. A Drop in the Ocean: The Story of Water, Jacqui Bailey (2006).
  2. Using Water, Sally Hewitt (2008).
Disclaimer and Safety Precautions provides the Science Fair Project Ideas for informational purposes only. does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against that arise thereof. In addition, your access to's website and Science Fair Project Ideas is covered by's Privacy Policy and site Terms of Use, which include limitations on's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

Add to collection

Create new collection

Create new collection

New Collection


New Collection>

0 items