1. Cycling of Matter By
Diana Bivens

2. Water Makes up around70-80% of human body Covers app 75% of planet
remains a liquid over a wide range of temps
solid state is less dense than the liquid state (ice floats)

3. Water Cycle Life depends on water
Water is continually cycled through the environment through
Precipitation
Evaporation
Transpiration
Condensation

4. http://player. discoveryeducation. com/index. cfm

5. Carbon is an element found in all living things
is a structural component of nutrients
proteins, carbohydrates, lipids
is released when consumers exhale (CO2)
is stored in fossil fuels, buried in earth
is found in some rock formations
Largest quantity is found in the ocean

6. Carbon Cycle All living organisms are made up of carbon molecules
Autotrophs use energy from the sun to convert CO2 (carbon dioxide)and water to C6H12O6 (glucose)and oxygen
Autotrophs use these molecules for energy and growth
Heterotrophs also use these molecules for energy and growth

7. Carbon Cycle Carbon returns to the atmosphere through Respiration
Decay
pollution

8. Excessive Carbon Dioxide
The industrial revolution has increased atmospheric CO2
CO2 is a greenhouse gas
Increased CO2 leads to over-insulation of the Earth’s atmosphere
(global warming)

9. Carbon Cycle

10. Nitrogen Cycle Earth’s atmosphere is approximately 78% nitrogen
Proteins, DNA, and RNA contain nitrogen
It is an essential element of life

11. Nitrogen Fixation
Atmospheric nitrogen is in a form that is not useable by living organisms (N2)
Nitrogen-fixing bacteria convert atmospheric nitrogen to a useable form
Some nitrogen is fixed during electrical storms

12. Nitrogen in Food Web Plants absorb Nitrogen from soil
Consumers gain Nitrogen by eating

13. Nitrogen Cycle Nitrogen is returned to soil through…..
Animal urination
Decay of animals
Proteins are converted to ammonia
Ammonia is then converted to form usable by plants

14. Denitrification
Bacteria works on nitrogen in the soil to release it back to the atmosphere

15. Pollution by Fertilizers
Runoff from the agricultural use of fertilizers can cause an increase in Nitrogen levels in water sources.
May result in algal blooms which can deplete water of oxygen
Increased nitrates in fresh water can lead to health problems (especially in infants)

16. Phosphorus Essential element for growth and development.
Amount of P present in an ecosystem is a limiting factor for growth of organisms.

17. Phosphorus Cycle

18. Phosphorus Cycle Includes 2 cycles
Long-term: weathering of rocks introduces P to the ecosystem.
Short-term: Phosphates are cycled through soil to producers, from producers to consumers, and back to soil through decomposition.

19. Water Pollution
Eutrophication (a type of water pollution) can occur when too much Phosphorus contaminates water.
This occurs by run-off from use of fertilizers or household detergents.

20. Eutrophication
An increase in P will lead to the algal blooms which can lead to the death of other organisms in a water source.