Across
- 2. It is a process of purifying drinking water with the help of chlorine tablets.
- 4. The substance in which the solute dissolves.
- 5. The practice of keeping yourself and your surroundings clean.
- 6. Any kind of waste that is thrown away.
Down
- 1. A process by which green plants prepare their own food.
- 3. This energy is obtained from the rays of the sun.