Plant Science Unit 3 Vocabulary Review

2. Having neither acid nor alkaline qualities, pH of 7.
6. Mass per unit volume.
8. The tissues outside the vascular tissue overlying a woody stem.
10. Fibrous, partly decayed fragments of vascular plants that retain enough structure so that the peat can be identified as originating from certain plants (e.g., sphagnum peat or sedge peat).
13. Soil or soil-like material in which plants are grown.
14. A mineral, or minerals, classified with the micas, which with treatment at high temperatures, expands into scales, and becomes a loose, absorbent mass.
17. A porous or spongy form of volcanic glass.
18. A popular water culture technique where the nutrient solution is continuously flowing at the tips of the plant's roots set in a medium.
19. Fibers made of natural or synthetic minerals used as a media for growing plants in a hydroponic system.
20. A system for the measurement of volume or space in cubic units.

1. The quantity of three–dimensional space enclosed by some closed boundary.
3. A hydroponic system that uses media to absorb the nutrient solution and hold it for the plant.
4. Growing plants in a nutrient solution and a media other than soil.
5. Any organic or inorganic material added to soil or water to provide plant nutrients and to increase the growth, yield, quantity, or nutritive value to the plants grown therein.
7. A hydroponic system where the roots are in constant contact with the nutrient solution where the media may not be as absorbent.
9. The removal of surplus ground or surface water by artificial means.
11. A system of hydroponics that involves misting roots with a nutrient solution.
12. The process by which air in the soil is replenished by air from the atmosphere.
15. oxygen The amount of oxygen found in water or solution.
16. A volcanic glass having numerous concentric cracks that give rise to perlitic structure. Used in synthetic potting media mix.
21. A measure of the amount of matter in an object.