Across
- 4. a mineral which grows when heated
- 6. the loose surface material that covers most land
- 7. The process of growing plants in sand, gravel or liquid, with added nutrients but without soil
- 9. a granular material that’s white in color
- 14. a hydroponic technique in which the plant stand in a shallow steam of water
- 15. a measure of how much oxygen is dissolved in the water
Down
- 1. a machine that measures the level of conductivity
- 2. a hydroponic method by means of suspending the plant roots in a solution of nutrient-rich, oxygenated water
- 3. a plant-cultivation technique in which the roots hang suspended in the air while nutrient solution is delivered to them in the form of a fine mist
- 5. the measure of ease at which an electrical charge can pass through a material
- 8. a scale used to specify acidity or basicity of an aqueous solution
- 10. Neither Positive nor negative
- 11. the level of acid in substances such as water, soil, or wine
- 12. a primary cell cultures prepared from dissociated fetal cells
- 13. a substance that provides nourishment