Separating Salt from Seawater:
To separate salt from seawater, Rishi can use the process of evaporation. This method takes advantage of the fact that saltwater has a lower boiling point than salt. Here is a detailed explanation of how Rishi can separate salt from seawater:

Materials Needed:
- Seawater
- Heat source (stove or fire)
- Pot or container
- Heat-resistant dish or tray
- Filter or sieve (optional)
- Funnel (optional)
- Collection container

Procedure:
1. Collect Seawater: Rishi should collect a sufficient amount of seawater. He can do this by filling a container or pot with seawater from the seashore.

2. Filtering (optional): If the seawater has any impurities or debris, Rishi can use a filter or sieve to remove them. This step is not necessary if the seawater is relatively clean.

3. Evaporation: Rishi should transfer the seawater from the pot to a heat-resistant dish or tray. He can use a funnel to make the transfer easier. The dish should be shallow to maximize the surface area exposed to heat.

4. Heat Source: Rishi needs to place the dish on a heat source, such as a stove or fire. The heat will cause the seawater to evaporate, leaving behind the salt.

5. Evaporation Process: Rishi should heat the seawater gently to avoid splashing or boiling over. As the water evaporates, he will notice that the liquid level decreases, and salt crystals start to form.

6. Collecting Salt: Once the seawater has completely evaporated, Rishi will be left with salt crystals in the dish. He can carefully scrape or pour the salt into a collection container.

Additional Tips:
- Rishi can repeat the evaporation process multiple times to obtain more salt if desired.
- If Rishi wants to collect salt without any impurities, he can use a filter or sieve to strain the seawater before the evaporation process.
- Rishi should be cautious while handling hot dishes and heat sources to prevent any accidents or burns.

By following these steps, Rishi can successfully separate salt from seawater using the process of evaporation.