1. Catalyst
Describe the rule of 10%.

2. What’s on the test tomorrow?
Ecology Review
What’s on the test tomorrow?

3. Terms biosphere, community, ecosystem, population
Organism relationships
Autotroph vs Heterotroph
Producer, herbivore, carnivore, decomposer
Primary Producer, Primary Consumer, Secondary consumer, Tertiary consumer

5. Relationships between Organisms
Predator-prey - interaction where one organism eats the other
Mutualism
both species benefit

6. Parasitism Commensalism
one organism benefits and the other is harmed
Commensalism
one organism is benefited and the other is neither harmed or benefited

7. Interspecific competition
competition for resources between organisms of different species.
Intraspecific competition
competition for resources between organisms of the same species.

9. Water Cycle
Liquid water returns to the atmosphere through evaporation and transpiration.
Condensation is when water vapor becomes liquid again

11. Nitrogen Cycle Needed for plants to build cells
Cycled through air by nitrogen fixing bacteria
Returned to soil from animal waste, animals dying

13. Living vs. nonliving
Biotic Factor anything living that affects the environment
Other animals, plants, dead decaying matter…
Abiotic nonliving factors –
like wind, air, climate, water…

14. Carbon Cycle Carbon dioxide cycles through plants and animals
Plants use CO2 in photosynthesis and give off O2
Animals use O2 and give off CO2
Reduction of plants, and increased pollution increases carbon in the atmosphere (global warming

16. Energy Flow All energy in an ecosystem comes from the sun
Plants convert light energy into sugar by photosynthesis
Food chains show how this energy is passed on to other organisms

17. Food chains show a path of energy
Food webs: Show the interconnectedness of an ecosystem

18. Energy pyramids
An energy pyramid shows the amount of energy available at each level
Only about 10% of energy from each level is passed on

19. Study Guide Questions?

20. Now… Kahoot – individual or with one partner.
Remember, all Ecology work is due tomorrow!