Unit 5 Food

2. Chemical substance produced and released into the environment by an animal,especially a mammal or an insect
6. A person interested in eating food that is locally produced
8. extreme Scarcity of food.
9. Supply energy for cellular processes
11. Proteins,carbohydrates, lipids
12. The process by which fertile land becomes desert
15. Plant crops in strips or alleys between shrub or trees
18. A natural earthy material that is plastic when wet
19. Supply energy for cellular processes
20. A substance required in relatively large amounts by living organisms, in particular
22. The supply of water to land or crops to help growth, typically by means of channels
24. To graze (land) to excess

1. Capable of producing crops; suitable for farming
3. Process of eroding by wind,water,or other natural agents
4. Deficiency of protein and other key nutrients in diet
5. A destructive insect or other animal that attacks crops, food, livestock, etc.
7. Unit for measuring the amount of energy food provides
10. The practice of tilling sloped land along lines of consistent elevation
13. A way of growing crops or pasture from year to year without disturbing the soil through tillage
14. The organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms.
16. A fertile soil of clay and sand containing humus.
17. farming A system of rearing livestock using intensive methods
21. Matter that has come from a recently living organism
23. The activity or business of felling trees and cutting and preparing the timber