Variables:

* Independent variable: amount of water available to the plant

* Dependent variable: plant growth

* Controlled variables: type of plant, size of plant, temperature, light, soil

Procedure:

1. Plant identical seedlings in pots of the same size.

2. Water one group of plants regularly, while watering the other group infrequently.

3. Observe and measure the growth of the plants over time.

Expected Results:

The plants that are watered regularly will grow more than the plants that are watered infrequently.

Conclusion:

The results of this experiment support the hypothesis that the amount of water available to a plant will affect its growth. Plants that are given more water will grow taller and produce more leaves than plants that are given less water.

Additional Questions:

* How does the amount of water available to a plant affect its root growth?

* How does the amount of water available to a plant affect its photosynthesis rate?

* How does the amount of water available to a plant affect its resistance to drought?