Practical-3: To compare the rate of seepage of water through clay, sand and gravel.

 

Aim

To compare the rate of seepage of water through clay, sand and gravel.

Materials Required

• 3 plastic bottles or funnels
• Clay
• Sand
• Gravel
• 3 beakers or measuring cups
• Water (equal amount)
• Stopwatch or clock

Procedure

1. Take three plastic bottles (or funnels) and label them A (Clay), B (Sand), and C (Gravel).
2. Fill each bottle with the same amount of the respective material.
3. Place a beaker below each bottle to collect the water.
4. Pour the same amount of water into each bottle at the same time.
5. Observe how quickly the water comes out and collect it for 5 minutes.
6. Compare the amount of water collected in each beaker.

Observation

Material	Rate of Seepage
Clay	Slowest
Sand	Moderate
Gravel	Fastest

Conclusion

• Water seeps fastest through gravel because it has large spaces between the particles.
• Water seeps moderately through sand because the spaces are smaller.
• Water seeps slowest through clay because its particles are very closely packed.

Result

The rate of seepage of water is:

Gravel > Sand > Clay