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7th Grade7th Grade
Unit 2: Unit 2: EcosystemsEcosystems
Lesson 1: Lesson 1: Energy FlowEnergy Flow
Vocabulary of Instruction:Vocabulary of Instruction:
Energy•Ability to do work.
Producers•Plants are
called producers because they are able to use light energy from the Sun to produce food (sugar) from carbon dioxide and water.
Consumers• Animals cannot
make their own food so they must eat plants and/or other animals.
• There are three groups of consumers.– Primary Consumers– Secondary
Consumers– Tertiary Consumers
Decomposers• Bacteria and fungi
which feed on decaying matter.
• Decomposers speed up the decaying process that releases mineral salts back into the food chain for absorption by plants as nutrients.
Omnivores•Animals and
people who eat BOTH animals and plants are called omnivores.
Carnivore•Are animals that
eat other animals.– carnivores that eat
herbivores are called secondary consumers.
– carnivores that eat other carnivores are called tertiary consumers
Herbivore•An animal that
feeds on plants.Also known as (or primary consumers).
Food Chain, Food Web, and/or Food Networks
•Describes the feeding relationships between species in an ecological community. They graphically represent the transfer of material and energy from one species to another within an ecosystem.
Food Chain
Food Web
Abiotic• Inanimate,
inorganic, not living.
• Examples:– Water– Soil– Sunlight– Rocks– Wind/Air
Biotic• Relating to,
produced by, or caused by living organisms.
• Examples:– Rabbit– Wolf– Bacteria– Plants/Grass– Mushroom/
Fungi