Across
- 3. A hole or tunnel in the ground made by an animal
- 5. Keeping animals and growing plants for food
- 8. An animal that feeds on plants only
- 9. A natural science concerned with the study of life and living organisms
- 10. Instrument for measuring atmospheric pressure
- 12. Any substance necessary to life and growth
- 13. A microorganism which can grow only in other cell
- 15. An animal that naturally feeds and possibly kills on others
- 16. The maximum amount a container can hold
- 18. A small or medium size woody plant
- 19. An atmospheric temperature of below freezing point,resulting in a coating of ice
- 20. To become bad or be slowly destroyed
Down
- 1. Make a word shorter
- 2. To change from a solid or liquid state into vapor,usually by heat
- 4. The use of water agriculture in order to help crop growth,especially in dry areas
- 6. A material that change the color of reflected light by absorbing selected wavelength
- 7. The wearing away of topsoil by water,wind or intensive farming
- 11. Produce new organisms of the same kind
- 14. Small opening as in a plant leaf especially for the passage of fluid or air
- 16. An orange vegetable root crop
- 17. A structured collection of similar cells
- 20. A regulated amount and mix of food to be consumed