1. Ecosystem Cycles Neither energy or matter is created or destroyed
It is cycled through an ecosystem

2. Carbon-Oxygen Cycle
Photosynthesis and respiration cycle Carbon and Oxygen atoms through an ecosystem
Consumers die → decomposers give off CO2
Consumers die → heat, pressure, time → become fossil fuel (coal, oil and natural gas)

4. Water Cycle
Evaporation – process by which water changes from a liquid into an atmospheric gas
Transpiration – loss of water from a plant through the stomata in its leaves
Condensation – process by which water changes from an atmospheric gas into a liquid
Precipitation - rain, sleet, hail, snow and other forms of water falling from the sky

6. Nitrogen Cycle N2 in air ( 80% of the atmosphere) organisms cannot use
Nitrogen fixing bacteria convert N2 into a usable form →plants use to grow
LEGUMES (beans, alfalfa) nodules contain bacteria that can take atmospheric N2 and convert it to usable nitrogen
Animals obtain nitrogen from the plants they eat and return it to the soil in their stool.

8. Phosphorus Cycle
Erosion releases phosphorus from rocks into the surrounding soil
Phosphate in soil can either:
Be used by plants
Leach (drain away from soil)
into the water
Animals receive nutrients by eating the plants
Decomposers return phosphorus to the soil
Phosphorus in water will be used by aquatic plant or settle in sediment that forms new rocks

10. ATP Cycle ATP (Adenosine Triphosphate) = The only usable energy form.
To release energy one of the bond between one of phosphate atoms is broken
Phosphate is released
Produces ADP (Adenosine Diphosphate) = the uncharged form
A phosphate must be added back to the ADP molecule to recharge it and make a new ATP molecule

11. +
ATP
(Fully Charged)
ADP
(Uncharged)

12. HOMEWORK:
Ecosystem Cycles Notes Assignment: YOUR CHOICE!!!