food

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Across
  1. 2. The green stuff found in plants
  2. 5. Chemical fertilisers contain these
  3. 7. This gas is needed by plants to make food
  4. 8. Aquatic plants underwater also need ...
  5. 12. Phosphorus and nitrogen in water causes ... bloom
  6. 14. This is a weed killer
  7. 17. We eat in order to ...
  8. 20. This type of paper used to tell how acidic or alkaline
  9. 23. Non-chemical fertilisers are also called ... fertilisers
  10. 24. This method grows plants in a mist of nutrients
  11. 25. Natural fertilisers
  12. 26. When trees are removed, soil is affected and this leads to
  13. 27. burning of trees lead to ...
  14. 28. Litmus paper change to this colour in acids
  15. 29. In the slash and burn method, ... help fertilise the ground
Down
  1. 1. Plants grown for food are called ...
  2. 3. Process ofmaking food by plants
  3. 4. This gas is given out by plants when making food
  4. 6. This chemical to kill insects affects the environment
  5. 9. When forest are removed, homes or ... of animals are destroyed
  6. 10. This method involves cutting down of trees
  7. 11. Comprises cheese, milk, butter
  8. 13. The natural ... of rats are snakes
  9. 14. This metho grows plants without soil
  10. 15. Chemical fertilisers affect ... life
  11. 16. Farmers use ... to control temperature, water and nutrient supplies
  12. 18. Plant ... can be used to kill weeds
  13. 19. This indicator changes to many colours based on pH
  14. 21. plants make food in the sun to produce
  15. 22. Food provides us with ...