1. My Life’s a Circle

2. Matter Cycles
the movement of INORGANIC materials from the atmosphere or soil into living ORGANISMS and back again.

3. WATER CYCLE
WATER IN
ATMOSPHERE
PRECIPITATION
EVAPORATION
WATER /ICE

4. WATER CYCLE EVAPORATION - liquid to gas PRECIPITATION - gas to liquid
Organisms return water to the atmosphere through TRANSPIRATION, PERSPIRATION, and EXCRETION

5. Carbon/Oxygen Cycle
CARBON DIOXIDE
PHOTOSYNTHESIS
RESPIRATION
OXYGEN

6. Carbon/Oxygen Cycle
Photosynthesis – plants use CARBON DIOXIDE and release OXYGEN
Respiration – plants and animals use OXYGEN and release CARBON DIOXIDE

7. Carbon/Oxygen Cycle
Burning of FOSSIL FUELS increases the amount of CARBON DIOXIDE in the atmosphere.
This may be increasing the temperature.
(GREENHOUSE effect)

8. Nitrogen Cycle NITROGEN GAS NITROGEN FIXATION DENITRIFICATION ANIMALS
PLANTS
NITRATES

9. Nitrogen Cycle Nitrogen is necessary to make AMINO ACIDS
Nitrogen FIXATION is done by plants containing rhizobium bacteria.
DENITRIFICATION is the returning of nitrogen into the atmosphere

10. Succession
The gradual, SEQUENTIAL replacement of POPULATIONS in an area

11. Pioneer Species
The first SPECIES to colonize an area

12. Seral Community
Intermediate COMMUNITIES

13. Climax Community
A community that will remain STABLE as long as it is left undisturbed

15. Primary succession
The sequential REPLACEMENT of populations of an area that has not previously supported LIFE
Example: Sand dunes, volcanic rock, glaciers removing soil, pavement

16. Secondary succession
The sequential REPLACEMENT of populations in DISRUPTED habitats that have not been totally stripped of soil and vegetation.
Example: FOREST FIRE, LOGGING, FARMING, MINING
Old field succession – Replacement of populations in abandoned farm fields

17. Succession in lakes
The transformation of CRYSTAL CLEAR BODIES OF WATER to dry LAND

18. Eutrophication
An increase in the amount of NUTRIENTS in an environment

19. Oligotrophic
A lake that is so low in NUTRIENTS that few organisms can LIVE in it.

20. Eutrophic
A lake with many NUTRIENTS in it.