Across
- 4. The protective layer of gases surrounding the Earth.
- 8. It is a dense, soft, bright, and slightly orange-yellow metal that is both malleable and ductile. Used as accessory.
- 10. The process by which water changes from liquid to vapor.
- 13. The source of life that is used for drinking, farming, and cleaning.
- 14. The layer of Earth where plants grow and food is produced.
- 15. The natural system that provides oxygen and regulates the climate.
- 16. A geological formation, typically composed of porous rock or sediment, that stores and transmits groundwater.
- 17. A clean source of energy that comes from the wind.
- 18. A renewable resource that comes from the sun.
- 19. A renewable energy source that comes from plant and animal waste.
- 20. Convert (waste) into reusable material.
Down
- 1. Essential for respiration in most living organisms and plays a crucial role in various chemical reactions, including combustion.
- 2. The movement of water through evaporation, condensation, and precipitation.
- 3. The gas that plants absorb during photosynthesis.
- 5. The process by which plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose (sugar) and oxygen.
- 6. The system that includes rivers, lakes, oceans, and groundwater.
- 7. A fossil fuel commonly used in vehicles.
- 9. A solid fossil fuel used mostly for electricity generation.
- 11. A natural resource that cannot be replaced in a short period of time.
- 12. A type of resource that can be naturally replenished.