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Unit 6A

Food Chains and Food Webs

TermDefinition
Food Chains A single pathway in which energy and nutrients are passed from one living organism to another. Energy is used up as it moves and the arrow represents energy being transferred.
Food Webs A network of food chains by which energy and nutrients are passed on from one living organism to another with multiple pathways. The arrows represent energy being transferred and energy is greatest at the bottom of the food web.
Carnivore Organisms that eat only meat.
Omnivore Organisms that eat both plants and meat.
Producer Organisms that make their own food.
Primary Consumer Organisms that eat producers.
Organism A living thing that moves, eats, respires, grows, reproduces, and shows sensitivity to stimuli.
Herbivore Organisms that eat only plants.
Flow of Energy How energy moves through an ecosystem from the sun, to producers, to consumers, and on to the next consumer, and so on.
Terrestrial Ecosystem A group of abiotic and boitic factors that come together to form an ecosystem that is on land.
Decomposers Organisms that recycle dead organisms into chemical nutrients used in soil, air, and water.
Scavengers Organisms that eat bodies of dead organisms.
Secondary Consumer Organism that eats primary consumers.
Tertiary Consumer Organisms that eats secondary consumers.
Marine Ecosystem A group of abiotic and boitic factors that come together to form an ecosystem that is in salt water.
Freshwater Ecosystem A group of abiotic and boitic factors that come together to form an ecosystem that is in fresh water.
Hydrothermal Vents A extreme environments where water is heated by underwater volcanic activity and chemosynthesis is the process producers use to create their own food due to a lack of sunlight.
Cold Seeps A extreme environments where methane and hydrogen sulfide are released into the ocean and chemosynthesis is the process producers use to create their own food due to a lack of sunlight.
Photosynthesis The process where green plants absorb energy from the sun and combine it with water and carbon dioxide to create glucose and oxygen.
Chemosynthesis A process that some organisms in extreme environments use to create their own food when there is a lack of sunlight. The reactants are carbon dioxide, water, and hydrogen sulfide and the products are sugar and sulfur compounds.
Consumers Organisms that get energy from eating other organisms.
Created by: PRO Teacher dowdyp
 



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