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What is an Eco System?
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What is an Eco System?
(You will be able to answer this question by the end of this lesson)•Abiotic Vs. Biotic•Basic Needs of Biotic Components•Biological Organization
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Life in a pond
• Look at the picture of a pond.
• Make a T-chart on a piece of paper.
• On the left-side write “Living
Components”.
• On the right-side write “Non-
Living Components”
• With a partner record as many items as
possible under each heading.
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Abiotic
• Abiotic: Refers to any non-living component of the environment.
• Some examples of abiotic components in an environment include:
air
water
soil
sunlight
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Biotic
• Biotic: Refers to any living component found in an environment.
• Examples of biotic components in an environment include:
Humans
Plants
Birds
Animals
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Basic Needs of Biotic Components
• Biotic components have 5 basic needs for survival.
• Most biotic components - polar bears, mosquitoes, dandelions, oak trees, and you - need these five basic things
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Basic Needs of Biotic Components
• Air (Oxygen or carbon dioxide)
• Water
• Food
• Energy
• Suitable habitat (place to live)
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Biological Organization
• Organism: a living thing
• Population: a group of organisms of the same species in a given area
• Community: a group of populations of different species in a given area
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Q: What is your definition of an ecosystem?
•A: An ecosystem is the network of interactions and relationships that link the biotic (living) and abiotic (non-living) parts of an environment
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Ecosystem Definition cont.
• An ecosystem can be large or small, but it must contain all abiotic and biotic features of the area.
• Example: A rotting log is an ecosystem, as long as all the organisms living in or on the log and all of the abiotic factors affecting the log are included.
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Classwork
• 1. Read over section 4.1 “What is an Ecosystem?” in your textbook.
• 2. Answer questions 3, 4, and 5 in “Check Your Learning” at the end of section 4.1.
• 3. Answer questions 2 and 4 in “Check Your Learning” at the end of section 4.2.
• (Make sure your answers are written using complete sentences, start with part of the question and include science vocabulary/concepts.)