bellringer 7-10 minutes: review characteristics of life. quietly quiz each other
TRANSCRIPT
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Bellringer
• 7-10 minutes:
• Review Characteristics of Life.
• Quietly quiz each other.
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Predator-PreyIn a predator-prey relationship one
organism benefits and the other is killed.
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Predator-Prey Cycle
Prey Population = Predator Population
More predators = more prey eaten
Prey Population Goes = Predator Population Goes
Less predators = less prey they eat
Predator: hunts: wolfPrey: hunted: rabbit
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Lab Report
• 1. Title for your Experiment
• 2. Hypothesis: Write your hypothesis (If, then) format
• 3. Materials: List materials: Include amounts
• 4. Procedure: List steps
• 5. Data Table: Label with Dates, Day number observed, Quantitative Data, Qualitative Data
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Nutrition and Energy Flow
Goal 5
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1. What is the source of all of the energy in this ecosystem?
2. What path (through what organisms) does the energy take to get to the hawk?
Focus Question
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How Organisms Obtain Energy
• Autotrophs= Plants= Producers: make their own food through photosynthesis.
• Use energy from the sun through the process of photosynthesis to make sugar
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• Heterotrophs=consumers
• Animals, Fungus, Bacteria, Protist
• Consume others to obtain energy
• Carnivores= eat meat
• Herbivores= eat plants
• Omnivores= eat plants and meat
• Decomposers= break down dead/decaying organisms
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Source of All Energy
• The sun is the source of all energy.
• The energy flows from the sun, to producers, to consumers.
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• Food Chain– Single path as
animals eat each other
– Autotroph to heterotroph to decomposers
• Food Web– MANY
interconnected food chains
– More realistic
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Food Chain vs. Food Web• Real life not as simple as a food chain
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Trophic Levels
• Producers are at the bottom
• Herbivores: 1st level consumers
• Carnivores and Omnivores: 2nd and above consumers
• Decomposers: All levels
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Energy Pyramid
Only 10% of the energy from each level is transferred to the next level.
Energy is lost for movement and life processes
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Biomass Pyramid
Biomass is greatest in producers. The mass is highest in producers
Pyramid of BiomassShows mass that is required to support level above
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Number Pyramid
The number of individual organisms is highest in producers and steadily decreases
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Summary of Trophic Levels
and Energy Flow:
What does the picture tell us?