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The heat gives off subtle infrared rays which produce thermal energy to heat the floor.

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to the energy contained within a system that is responsible for its temperature.

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Every atom seeks equilibrium at the lowest energy level, giving off surplus energy as radiation.

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fixed distances from the nucleus of an atom where electrons may be found.

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All big cats, such as tigers, lions, pumas and jaguars are tertiary consumers.

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Tertiary consumers are animals that eat other animals.

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Foxes eat rabbits at the second trophic level, so they are secondary consumers.

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Secondary consumers are organisms that eat primary consumers for energy.

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Grasshoppers are primary consumers because they eat plants, which are producers.

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Primary consumers make up the second trophic level.

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Since animals are higher on the trophic level, they are less efficient sources of food energy.

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each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy.

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The centerpiece was an energy pyramid, much like the familiar food pyramid, except with crop residue at the bottom leading right up to wind, solar and hydrogen.

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a graphical representation of the energy found within the trophic levels of an ecosystem.

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The whole food chain is affected by the over-use of chemicals in agriculture.

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a hierarchical series of organisms each dependent on the next as a source of food.

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The teacher had the students draw out a food web showing which animals the fox ate and which animals ate the fox.

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a system of interlocking and interdependent food chains.

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he studied ecology and environmental science.

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the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.

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a particular section, group, or type of people or animals living in an area or country.

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she served her local community for many years as a counselor. 

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a group of people living in the same place or having a particular characteristic in common.

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the marine ecosystem of the northern Gulf had suffered irreparable damage.

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a biological community of interacting organisms and their physical environment.

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a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.

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an organism deriving its nutritional requirements from complex organic substances.

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The vegetable autotroph harnesses solar radiation for its life process, converting it into chemical energy.

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an organism that can produce its own food using light, water, carbon dioxide, or other chemicals

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All life on earth is directly or indirectly reliant on producers, hence, they form the base of the food chain.

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an organism that creates its own food or energy.

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The government instituted a consumer protection agency.

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a person or thing that eats or uses something.