Across
- 4. A spiral of ocean currents in the major oceans
- 6. Warming Increase of temperature in the atmosphere
- 7. Cycle The cycle between living and non-living environments
- 9. A community of living and interacting organisms and their environment
- 10. Time between glaciations
- 13. The state of the atmosphere
- 15. The main basic of natural gas
- 16. All the liquid of water on the Earth's surface
- 17. Layers of gases around the planet
- 18. Change A change in the Earth's climate
Down
- 1. Be maintained at a certain rate or level
- 2. Currents Continuous movement of water due to natural processes e.g. wind
- 3. Prehistoric organisms remains
- 5. Life in the world or habitat or ecosystem
- 8. Fuels Natural fuel
- 11. Land masses on the Earth
- 12. Layers of soil and rock that remains frozen throughout the year
- 14. All living things
- 18. Dioxide Colourless and odorless gas, produced by burning carbon or organic substances