Aim: To prove that roots grow towards water. Apparatus or materials: Two glass troughs, soil, two similar plants, clay pot, water.
Procedure:
1. Take two glass troughs A and B,
2. Fill each one of them with two thirds of soil,
3. Plant a tiny seedling in trough A.
4. In trough B, plant a similar seedling and place a small clay pot inside the soil.
5. Water the soil in the trough A daily and uniformly.
6. Do not water the soil in trough B, but put some water in the clay placed in the soil.
7. Leave both the troughs for a few days.
Observation: On examining the roots later, it will be found that the root in the trough B has bent towards the source of water. Roots in trough A grew normally straight. Result: The growth of roots towards water is known as hydrotropism. In this experiment roots bent towards water. By this experiment it was proved that roots always grow towards water.
