1. The bacteria that changes nitrogen (N2) into ammonia (NH3) – Rhizobium
2. What is NO3-? Nitrate
3. A type of bond that forms when two atoms share electrons – covalent
4. An atom or group of atoms with a charge – ion
5. A process that changes N2 into NH3 – nitrogen fixation
6. Also known as blue-green algae, these organisms carry on nitrogen fixation in lakes- cyanobacteria
7. Process that changes ammonia into nitrates or nitrites – nitrification
8. What is the chemical formula for nitrate? NO3-
9. This structure is made of protons, neutrons and electrons - atom
10. A compound that contains carbon – organic
11. The location on a legume plant where nitrogen fixation occurs – root nodules
12. The name given to the way in which water, carbon and nitrogen move through an ecosystem – Biogeochemical Cycle
13. Plants use this organic compound during photosynthesis to make glucose – CO2
14. An atomic particle with a positive charge – proton
15. Atomic particles that form bonds – electrons
16. An atomic particle with no charge – neutron
17. What is the chemical formula for nitrite? – NO2-
18. The term used to describe where a nutrient is located within the ecosystem – reservoir
19. A picture that show the amount of energy decreases as it moves through the trophic levels – P of E
20. A picture that shows the number of organisms decreasing at each trophic level – P of N
21. A picture that shows the amount of biomass decreasing at each trophic level 0- P of B
22. A chemical that is used to kill insects – pesticides
23. What is the process that causes dead animals and plants to break down? Decomposition
24. Decomposition is a process in the nitrogen cycle that adds _____ to the soil. Ammonia
25. The increasing amt of a pollutant or toxin in the bodies of organisms in each trophic level – Bio Mag
26. What atom is found in all organic compounds? Carbon
27. Photosynthesis requires carbon dioxide and ____ to make sugar. Water
28. What is the process that changes nitrates into nitrogen? Denitrification
29. In what reservoir can we find nitrogen and water vapor? Atmosphere
30. What biogeochemical cycle shows the movement of organic compounds? Carbon
31. What biogeochemical cycle has the process transpiration. Water
32. What term is for a specific feeding level in food chain? Trophic level
33. What is the charge on a proton? +
34. What is the charge on a neutron? None
35. A particle that has a negative charge in an atom – electron
36. How plants obtain nitrates from the soil in the nitrogen cycle – assimilation
37. A nitrogen containing compound that organisms execrete – urea, urine, uric acid
38. A nitrogen containing compound that consumers can eat – protein
39. The term to describe how a nutrient moves through a cycle – process
40. The cycle that includes urea, proteins, nitrites – Nitrogen
41. Organisms that are essential for the nitrogen cycle – bacteria
42. Compounds without the atom carbon are called __ -inorganic
43. Two or more different atoms bonded together form? compounds