ecology week 2 lpa 2013-2014. monday objective i will explain relationships between matter cycles...
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Monday Bell work
• Complete questions 1-3 on page 54 with complete sentences.
• Complete questions 1-2 on page 58 with complete sentences.
Vocabulary Review
• Make sure you review the following terms from Middle School:– Gas– Liquid– Solid– Photosynthesis– Cellular Respiration
Vocabulary
Use the reading from last night to define the following terms:– Biogeochemical cycle– Fossil fuel
Notes
• Unlike energy, matter is not lost as it passes through an ecosystem.
• Matter is recycled– Biogeochemical cycles• Water cycle• Carbon cycle• Nitrogen cycle• Oxygen cycle
Notes
• “Food For Thought” at the bottom of page 52– Where does the water come from that is needed
by your cells?
Notes
• The Carbon Cycle• How do organisms obtain carbon?– Photosynthesis• Know the equation!
• The cycling of carbon dioxide in photosynthesis and cellular respiration are main components of the carbon cycle.
Notes
• How is carbon released to the atmosphere?– Cellular respiration– Transpiration– Burning of fossil fuels– Decomposition of organic matter
Notes
• Global Warming– Earth’s average temperature is slowing rising from
year to year.– Some scientists attribute this rise to increased
levels of CO2 in the atmosphere.
Activity
• On page 52, color the:– Gases – gray– Liquids – blue– Solids – white
• On page 56, use a colored pencil to trace Carbon’s path in the cycle.
Homework
• Draw the water and carbon cycles on separate papers.
• Read pages 59-65. Come to class prepared to share a question from your reading.
Vocabulary
Use the reading from last night to define the following terms:– Nitrogen fixation– Denitrification
Notes
• The Nitrogen Cycle– Important for proteins and DNA.
• In order for plants to make use of nitrogen, it must be transformed into molecules they can use.– Lightning– Nitrogen fixation– Released by decaying organisms
Notes
• Nitrogen fixation– On land:• Special nitrogen fixing bacteria transform the nitrogen
gas in the atmosphere into useful forms (ammonium).• These bacteria live in the roots of plants in the pea
family (legumes).
– In Water:• Special bacteria in water also “fix” nitrogen gas into
ammonium to be used by aquatic plants.
Notes
• Denitrification– Turning nitrate back into nitrogen gas.– Special “denitrifying bacteria” in the soil, swamps
and lakes– Take in ammonium and release nitrogen gas
Notes
• The Oxygen Cycle• Driven by PHOTOSYNTHESIS• The Ozone layer absorbs harmful ultraviolet
radiation.
Homework
• Draw the Nitrogen Cycle on a separate paper.• Read pages 66-68. Come to class prepared to
ask questions about your reading.
Wednesday Objective
• I will explain how limiting factors affect the amount of resources available to an ecosystem.
Vocabulary
Use the reading from last night to define the following terms:– Limiting factor– Carrying capacity
Notes
• Review graph on page 66. – Exponential growth– Logistic growth– Carrying capacity• Birth and death rates become stable
Notes
• An increase in resources = _____________ in birth rate and _____________ in death rate.
• A decrease in resources = _____________ in birth rate and _____________ in death rate.
Question
• How does water act as a limiting factor?– In Utah– In the Sahara Desert– In Alaska– In Washington DC– In Lake Powell
Wednesday Objective
• I will explain how limiting factors affect the amount of resources available to an ecosystem.
Activity
• Review the Nitrogen Game introduction and procedures.
• Create the passports.
• Conduct the activity
• Answer the questions and write the conclusion.
Bell work
• Write a paragraph describing how biogeochemical cycles can be limiting factors on an ecosystem.
Activity
• Review the Oh Deer, introduction and procedures.
• Obtain your materials.
• Conduct the activity and record your data.
• Answer the questions and write the conclusion.
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