1. Cycles Through The Ecosystem

2. Define Biogeochemical Cycle:
The movement of a particular chemical through the biological (living) and geological (non-living) parts of an ecosystem

3. The elements important to life that are recycled are
Water (hydrologic)
Oxygen (O₂)
Carbon (C)
Nitrogen (N)
Phosphorus (P)

4. 1. The water cycle is also called the
Hydrologic cycle

5. 2. Condensation
Is the process that turns water vapor into liquid , which causes the formation of clouds.

6. 3. After it rains, the water can either end up on land or in a body of water such as streams, lakes and ocean.

7. 4. When water evaporates from a leaf, this process is called transpiration.

8. 5. When water is heated in an ocean, the liquid water changes form and turns into water vapor.
6. When water leaves a body of water after it is heated, the process is called evaporation.

9. 7. When water falls from the sky, the process is known as precipitation (rain/snow)

10. 8. When water hits land and is soaked into the ground, the water becomes ground water.

11. 9. True or False
The water cycle is a continual process.

12. True or False
The water cycle is a continual process.

13. 10. True or False
Transpiration is a process that occurs on plants and animals.

14. True or False Only in plants
Transpiration is a process that occurs on plants and animals.
Only in plants

15. Water Cycle Fill in the diagram using the following terms:
-Condensation
-Evaporation
-Transpiration
-Precipitation
-Percolation (ground water)

16. Oxygen Cycle
1. Plants release 430 – 470 billion tons of oxygen during the process of photosynthesis.

17. Oxygen Cycle
2. Atmospheric oxygen in the form of ozone provides protection from harmful ultraviolet rays.
Skin cancer

18. Oxygen Cycle
3. Oxygen is found everywhere on Earth, from Earth’s crust (rocks) to the ocean where it is dissolved.

19. Oxygen Cycle
4. Oxygen is vital for respiration (breathing) by animals, a process which produces CO₂ and water.

20. Oxygen Cycle
5. Oxygen is also necessary for the decomposition of waste into other elements necessary for life.
Skip 6

21. Oxygen cycle
Most available oxygen is made by phytoplankton on the ocean’s surface and green plants on the land by photosynthesis.
Some oxygen is made in the atmosphere, when sunlight breaks down water.
Most oxygen is stored in the oxide minerals of the Earth’s crust and mantle, called the lithosphere, but is bound to rocks and unavailable for use.
Oxygen is used by animals, plants, bacteria, fire, decomposition, and even rusting metal, called oxidation.

22. Oxygen Cycle

23. Carbon Cycle
1. Plants use CO₂ (carbon dioxide) in the process of photosynthesis to make sugar and oxygen.

24. Carbon Cycle
2. Animals use oxygen in the process of respiration and make more CO₂ (Carbon dioxide).

25. Carbon Cycle
3. The ocean is the main regulator of carbon dioxide in the atmosphere because CO₂ dissolves easily in it.

26. Carbon Cycle
4. In the past, huge deposits of carbon were stored as dead plants and animals – decayed.
Today these deposits are burned as fossil fuels, which include oil, natural gas and coal.

27. Carbon Cycle
More CO₂ is released in the atmosphere today than in the past because of the burning of fossil fuels.

28. Carbon Cycle
7. Another natural source for CO₂ is methane

29. Carbon Cycle
Too much CO₂ in the atmosphere may be responsible for the greenhouse effect.

30. Carbon Cycle Use the following words to fill out the diagram
9. Skip
Use the following words to fill out the diagram
Burning – emission of CO₂
Cellular Respiration
Photosynthesis
CO₂ in the atmosphere

31. Carbon Cycle

32. Norton the Nucleus Explains the Carbon Cycle
Carbon Cycle Explained

33. Nitrogen Cycle 1. Our atmosphere is 78% nitrogen gas.
2. Animals and plants cannot directly use all the nitrogen found in our atmosphere.

34. Nitrogen Cycle
3. Only special bacteria can directly use nitrogen in our atmosphere and “fix” it so other organisms can benefit. These bacteria are called nitrogen fixing bacteria.

35. Nitrogen Cycle
4. Higher organisms (Animals) use nitrogen to make their proteins.

36. Nitrogen Cycle
5. Animal waste decay by the action of bacteria which create ammonia and nitrate products rich in nitrogen and useful for plants to use again.

37. Nitrogen Cycle
6. Denitrifying bacteria in the soil can break down the ammonia into the gaseous from of nitrogen, which is not available (usable) for plants and animals.

38. Nitrogen Cycle
7. In another part of the cycle, animals eat plants containing nitrogen, which is again returned to the soil by animal waste or decaying plants and animals.

39. Nitrogen Cycle Label the diagram using the following words
Plant made protein
Nitrites
Nitrates
Ammonia
Dead plants and animals
Animal Protein
Nitrogen in the air

40. Nitrogen Cycle

41. Nitrogen Cycle Explained

42. Phosphorus Cycle
1. Phosphorus is NOT found in the free state in nature, but is contained mostly in rocks and minerals

43. Phosphorus Cycle We are made of DNA!!
2. It is an essential nutrient for life, as it makes up important chemicals such as DNA
We are made of DNA!!

44. Phosphorus Cycle
3. In the phosphorus cycle, phosphorus moves between the soil and plants, which are eaten by animals. The animals use phosphorus, and their waste products help return the sulfur for the next generation of phosphorus in the soil.

45. Phosphorus Cycle
4. Some of the phosphorus in soils can be washed away into water pollution.
5. Another source of phosphorus in water comes from man-made basins.

46. Phosphorus Cycle
6. Too much phosphorus in water leads to plant overgrowth, strangling all other life forms in the water.

47. Phosphorus Cycle
7. Why is the use of too much phosphorus-rich fertilizers bad for the environment?

48. Phosphorus Cycle
7. Why is the use of too much phosphorus-rich fertilizers bad for the environment?
Agriculture runoff goes into aquatic ecosystems which cause plants to grow and overpopulate the water.

49. Phosphorus Cycle Label the diagram using the following vocabulary
Animals
Plants
Erosion
Soil phosphate
Crops
decomposers

50. Phosphorus Cycle

51. Phosphorus Cycle
Crash Course Nitrogen & Phosphorus

52. Acid Rain Explained
Acid Rain Explained