Biology

2. happens when a liquid turns into a gas
5. cycle
6. water
8. conversion of a substance from the solid to the gaseous state without its becoming liquid
9. the loss or removal of nitrogen or nitrogen compounds
10. a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements
12. water which collects as droplets on a cold surface when humid air is in contact with it.
13. cycle
14. cycle the continuous movement of water within the Earth and atmosphere
15. a microbial process by which reduced nitrogen compounds (primarily ammonia) are sequentially oxidized to nitrite and nitrate

1. nonmetallic chemical element of the nitrogen family (Group 15 [Va] of the periodic table) that at room temperature is a colourless, semitransparent, soft, waxy solid that glows in the dark
3. the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers`
4. a nonmetallic element found more or less pure in nature (as in diamond and graphite) or as a part of coal and petroleum and of the bodies of living things or obtained artificially see element.
7. A nonmetallic element that makes up about 78 percent of the atmosphere by volume, occurring as a colorless, odorless gas
11. any liquid or frozen water that forms in the atmosphere and falls to Earth