Explain how all the air in a room gets heated when a room heater kept on the floor in a corner of the room is switched on. Draw a labelled diagram to explain.

Explanation

### Step-by-Step Solution:

1. **Understanding the Room Heater's Function**:
- When a room heater is switched on, it generates heat. The heater is usually placed on the floor in a corner of the room.

2. **Heating of Air Near the Heater**:
- The air that is closest to the heater gets heated first. As the air warms up, it expands and becomes less dense (lighter).

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