Mention four uses of convection currents.

Explanation

### Step-by-Step Text Solution:

1. **Boiling of Water**:
- Convection currents play a crucial role in the boiling of water. When water is heated, the water at the bottom of the pot becomes hot and less dense, causing it to rise. As it rises, cooler water from the top moves down to take its place. This continuous cycle of rising hot water and sinking cold water creates convection currents that help in evenly distributing heat throughout the water, leading to boiling.

2. **Air Conditioning**:
- In air conditioning systems, convection currents are utilized to cool down a room. The air conditioner removes hot air from the room and replaces it with cooler air. The cooler air, being denser, sinks while the warmer air rises, creating a cycle that maintains a comfortable temperature in the room.

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