Across
- 3. the measured amount of heat in a place or in a body.
- 5. the study or knowledge of scientific discoveries.
- 10. water that has frozen and has become solid.
- 11. extremely large round mass like the Earth.
- 12. detailed study of a subject.
- 15. the ocean.
- 16. fuel made by vegetable oils or animal fat.
- 17. the quality of being hot or warm.
- 18. extreme weather condition with very strong wind and rain.
- 19. things that become different.
Down
- 1. air substances.
- 2. a long period when there is no rain.
- 4. plans of methods if you can use and if you do not want you use another.
- 6. a fuel that is made of living things or their waste.
- 7. a type of fuel that is made of plants and can be mixed with petrol as a fuel for cars.
- 8. the mixture of gases around the Earth.
- 9. a large country in the Pacific Ocean.
- 13. the act of being destroyed.
- 14. drops of water from clouds.
- 17. a person or people as opposed to animals.