Science 7 notes glb lab 04 beneath the surface
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Transcript of Science 7 notes glb lab 04 beneath the surface
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Beneath the SurfaceObserving an Aquatic Ecosystem
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Key Objectives:
The student will:– Investigate and understand
the carbon, nitrogen and water cycles
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Key Objectives:
The student will:– Differentiate among key
processes in the water, carbon and nitrogen cycles and analyze how organisms function to recycle matter into the ecosystem
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Key Objectives:
The student will:– Recognize that the carbon
dioxide oxygen cycle is part of photosynthesis
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Key Objectives:
The student will:– Define and/or identify the
living (biotic) and nonliving (abiotic) components /factors of an ecosystem
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Key Objectives:
The student will:– Observe local ecosystems
and measure and classify the biotic and abiotic factors
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Key Objectives:
The student will:– Define and describe a simple
food chain
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Key Objectives:
The student will:– Compare and contrast
complex relationships between terrestrial, freshwater and marine ecosystems
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Key Objectives:
The student will:– Use a food web and energy
pyramids to analyze the flow of energy in ecosystems
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Key Objectives:
The student will:– Relate the role of humans in the
ecosystem
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Key Terms
EcosystemBiotic factorAbiotic FactorWater QualityLimiting Factors
HabitatCommunityPopulationFood ChainFood WebPredator – prey
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Ecosystem
An ecosystem is made up of living organisms which interact with others in their own population, the community and the non-living parts of the community
Can be large or small
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Ecosystem
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Biotic Factor
All living things in an environment
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Abiotic Factor
All non-living and never lived things in an environment
They determine which organisms are able to live in the environment
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Abiotic and Biotic Factors
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Limiting Factors
Factors that prevent the continuing growth and survival of an organism
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Limiting Factors
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Water Quality
How healthy or how good the water is to support a community
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Water Quality
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Habitat
The environment where a species exists
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Habitat
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Community
All the living parts of an ecosystem that live in the same place at the same time
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Community
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Population
All individuals of one species living together in a given area
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Population
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Food Chain
The order in which energy travels – Producers
Plants– Consumers
Herbivores, Carnivore, Omnivores– Decomposers
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Food Chain
or… More simply put:– Algae makes food (glucose)– Tiny fish eats algae– Bigger fish eats tiny fish, – Bear eats fish
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Food Chain
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Food Web
The intricate food web of food chains that shows interactions between many sources of food from producer to the consumer
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Food Web
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Predator - Prey
The relationship between what animals (the predator) do the eating and what animals are eaten (Prey)
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Predator – Prey
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Lab Time
Now it is time to introduce the new lab.
Pease open your Green lab guides
Read the introduction silently as I read it aloud
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Essential Learnings
There are four levels of organization within a Biome– An Ecosystem– A Community– A Population– An Organism
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Essential Learnings
Living things in the environment are called Biotic Factors
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Essential Learnings
Nonliving features of the environment, such as water quality/quantity, sunlight, range of temperature, soil composition, air quality, and water chemistry are called Abiotic Factors
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Essential Learnings
The number of different types of organisms an ecosystem can support depends on biotic and abiotic factors
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Essential Learnings
Factors that prevent survival of an organism are called Limiting Factors
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Essential Learnings
Limiting factors could include:– Lack of resources– Predation– Unsuitable climate– Disease
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Essential Learnings
Ecosystems are dynamic and change over time
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Essential Learnings
Changes that effect organisms can be :– Daily– Seasonal– Long-term
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Essential Learnings
Large Scale events such as Eutrophication (the addition of excess nutrients) or catastrophic events like drought, flood or fire also change ecosystems
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Essential Learnings
Organisms have specific structure, functions and behaviors that enable them to survive in their ecosystem
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Essential Learnings
Populations of organisms are categorized by the way they obtain food in an ecosystem
Plants and many microrganisms make their own food
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Essential Learnings
Anything that makes its own food is called a Producer
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Essential Learnings
Most everything else must obtain food from another source.
Consumers consume food made by producers
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Essential Learnings
There are three types of consumers– Herbivores – Plant eaters– Carnivores – Meat eaters– Omnivores – Meat and Plant
eaters
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Essential Learnings
There is a third member of the food cycle that starts at the end of life
These break down dead plants and animals
They are called decomposers