1. 3.3 Cycles of Matter

2. Objectives  Describe how matter cycles among the living and nonliving parts of an ecosystem. ---------------------------------------------------------------------------  Explain why nutrients are important in living systems.  Describe how the availability of nutrients affects the productivity of ecosystems.

3. So Far…  We’ve talked about biotic factors of ecosystems…today and tomorrow were going to talk about abiotic factors…  What are biotic factors?  What are abiotic factors?

4. What are the three most important things you need in order to live???  I once asked this question…

5. What are the three most important things you need in order to live???

6. The Water Cycle  All living things need water to survive.

8. The Water Cycle

9.  Water moves between the ocean, atmosphere, and land through a process called the water cycle.  Evaporation – water changes from liquid to gas.  Transpiration – water evaporates from leaves.  Condensation – water changes from gas to liquid and becomes a cloud.  Precipitation – rain, snow, sleet, or hail.  Can fall into rivers and be carried to oceans  Seep into soil and sucked up by plant roots or become ground water.

10. Assignment - Requirements  Create a comic strip about a “drop” of water that goes through the water cycle.  The “drop must completely go through the water cycle and hit all seven stages on the diagram on page 75.  Evaporation  Transpiration  Condensation  Precipitation  Runoff  Seepage  Root uptake  Underline the seven words used.  Can be in color…more points given for color!!! Due Friday!!!

11. Assignment  Your comic should CAN BE FUNNY AND ORIGINAL!!!  Have your droplet go through sewers, drains, oceans, toilets, whatever you want it to go through.  Give your water human characteristics such as the ability to talk, facial features, hair, clothes, weapons, anything.

12. Objectives  Describe how matter cycles among the living and nonliving parts of an ecosystem. ---------------------------------------------------------------------------  Explain why nutrients are important in living systems.  Describe how the availability of nutrients affects the productivity of ecosystems.

13. Review  What is the autotroph in the following food web?

14. Review What is the autotroph in the following food web? Identify a herbivore in this food web. Identify a carnivore in this food web. Identify a omnivore in this food web.

15.  What is the shared role of the bacteria, daphnia, and centipede in this food web?

16. Review II’ll give you the definition, you give me the word: TThe process of going from a liquid to an atmospheric gas. EExamples include rain, sleet, hail, and snow. EEvaporation from the leaves of plants. TThe process of water vapor becoming a cloud.

17. Nutrient Cycles NNutrients – chemical substances an organism needs to sustain life. WWITHOUT NUTRIENTS YOU WOULDN’T BE ABLE TO CREATE TISSUE (grow) OR CARRY OUT ESSENTIAL LIFE FUNCTIONS. Three Key Nutrients: 1)Carbon 2)Nitrogen 3)Phosphorous

18. The Carbon Cycle (pg. 77) CCarbon has many roles: KKey ingredient in living tissue. FForms CO Four Process That Move Carbon: 1) Biological process (photosynthesis & respiration) 2) Geochemical processes (volcanic eruptions) 3) Burial and decomposition of dead organisms (or creation of fossil fuel). 4) Human activities (burning fossil fuels, burning forests)

20. The Nitrogen Cycle (pg. 78)  All organisms need nitrogen to create proteins.

21. The Nitrogen Cycle (pg. 78)  All organisms need nitrogen to create proteins.  Nitrogen fixation – process of converting nitrogen gas into usable nitrogen in the soil.  Done by special bacteria that live in special roots called legumes. DDenitrification – process of converting usable nitrogen into nitrogen gas. DDone by plants that take up nitrogen in soil.

22. The Phosphorus Cycle (pg. 79) EEssential to living organisms because it forms DNA. SStays in rocks, soils, and dissolved in water. PPlants then absorb the usable phosphorus.

23. Nutrient Limitation SSometimes an ecosystem can be lacking in one nutrient, and be unable to support life. LLimiting nutrient – ecosystem is limited by a single nutrient that is scarce.

24. Closure  Water cycle  Carbon cycle  Nitrogen cycle  Phosphorous cycle  Nutrient Limitation  QUIZ TOMORROW!!!

25. Assignment  To help prepare you for your quiz:  Pg. 73 1-5  Pg. 80 1-5