1. Recycling Matter
The flow of nutrients between organisms and their environment is referred to as a
biogeochemical cycle.

2. Carbon Cycle

3. Key to Life Carbon is the element that is central to all life.
Backbone of every organic molecule found.
Inorganic carbon also prevalent on the planet.
It is found dissolved in the oceans.
It is contained in rocks and sediments.
It is found in the atmosphere, mostly as CO2.

4. Carbon can be cycled fast or slow
Fast cycling involves photosynthesis and cellular respiration
Slow cycling involves carbon sources and carbon sinks.

5. Fast Cycling
Photosynthesis takes in approximately billion tones of carbon every year.
That’s about the mass of 9 million elephants, or 1 trillion people!

6. Slow Cycle Oceans are massive carbon sinks
Volcanoes release significant amounts of carbon

10. Human Impact Combustion of Fossil fuels Reduction of Vegetation
Increased Population
Increased livestock production

11. Global Warming
Increased Carbon in the Atmosphere Leads to an increase in the Greenhouse effect and Climate Change.

14. Sulfur Cycle

15. Key points in the sulfur cycle
There are decomposers that convert sulfur to sulfide and others that convert sulfides to sulfur
Human activities are responsible for far more generation of sulfates in the atmosphere than natural processes
Sulfates and sulfides that combine with water in the air form hydrosulfic acid and sulfuric acidacid deposition
Problematic when it causes acidification of lakes and corrosion of metal and stone structures
Sulfur is used by plants for protein synthesis