GLOBAL SYSTEMS

2. fuel Natural fuel formed millions of years ago from the remains of living organisms e.g coal
5. Form of light we cannot see but can feel as heat.
11. effect The trapping of the sun's warmth.
13. sheet Layer of ice covering extensive tract of land for a long period of time.
15. A energy type derived from renewable plant and animal materials.
16. Plants and other organisms convert the suns light to energy.
18. The changing of water vapor back into liquid state and forming clouds by using cold temperatures.
19. A substance that can be replaced and is of economic value.
20. Colorless, odorless, flammable chemical compound found throughout the earth.
21. A layer of gases surrounding the Earth
22. A measure of the average temperature, humidity, wind, precipitation and meteorological patterns.
23. Our living world.
24. Nino Effects the global climate, warm water in the pacific.
25. Nonreactive gas that forms about 78% of the earth's atmosphere.

1. Parts of the radio spectrum with relatively long wavelengths.
3. Energy that comes from a source which is able to penetrate various materials e.g light, radio microwaves.
4. Soil that remains bellow the freezing point of water for two or more years.
6. Gases and other particles released into the atmosphere by burning fuels.
7. Period of milder climate between two glacial periods.
8. The state of the atmosphere at a given time and place with regards to temperature, moisture, wind velocity.
9. All the waters on the earths surface.
10. Outer part of earth, consists of crust and upper mantle.
12. All the living organisms existing together in a particular area .
14. The clearing of natural trees in forest areas.
17. Circulation in the Pacific which depends upon conjoint effect of temperature and salinity.
22. Dioxide Naturally occurring chemical compound.