Across
- 2. Essential gas we breathe
- 6. To maintain something in its original state
- 8. Systematic investigation into a subject or problem
- 9. Make something clear or understandable
- 11. Appliance to keep things cool
- 13. A yellow tropical fruit
- 14. To keep away from something
- 16. The process by which plants make their own food using sunlight
Down
- 1. Not enjoyable or agreeable
- 3. The surroundings or conditions in which a person, animal, or plant lives
- 4. The importance of something in relation to the matter at hand
- 5. Beneath the surface of the earth
- 7. Microorganisms that can cause disease
- 10. To wash out or drain away
- 12. To develop gradually over time
- 15. To make impure or harmful