Global Systems

4. The release of something, specifically gas or radiation.
5. A natural process in the water cycle. When water changes state by heat energy from the sun.
7. The gasses that surround the earth or other planets.
8. One of the four main Greenhouse Gasses.
11. When the sun is trapped in the atmosphere of a plants atmosphere.
12. It is all of the water that is on the surface of the Earth.
15. The surface of the Earth where living organisms exist.
18. One of the four main Greenhouse Gasses.
22. A large layer of ice.
23. Periods of global warming
25. A element (gas) that is found in proteins.
26. When weather conditions are common for a long period of time.

1. The conversion of a vapour to liquid.
2. This is the process by which green plants get their nutrients from the sun heat energy.
3. Another name for the global conveyor belt.
6. A layer of soil or rock that is below freezing point.
9. The clearing of a forest or trees.
10. The process where plants use sunlight to produce nutrients from carbon dioxide.
13. A natural source of energy that is not drained by use, such as water, solar power and wind power.
14. The outer part of the earth.
16. The activity when hot water floats on top of cold water because it is less dense.
17. The state of the earth such as wind, rain, temperature and cloud cover.
19. A new type of fuel that is renewable. Its is manufactured by fermenting sugars in crops.
20. The cycle in which carbon dioxide is released into the atmosphere. It is used in the process of photosynthesis.
21. A natural fuel e.g coal or gas.
24. A wavelength that travels more then one kilometre.