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| The study of the interactions among organisms and between organisms and abiotic (non-living)environment. |
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| A group of organisms of the same species that live together in the same area at the same time. |
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| A natural association that consists of all the populations of different species that live and interact together within an area at the same time. |
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| A community and its physical environment. |
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| A region that includes several interacting ecosystems. |
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| The layer of the Earth that contains all living organisms. |
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| First law of thermodynamics |
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Definition
| A physical law which states that energy cannot be created or destroyed, although it can change from one form to another. |
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| Second Law of thermodynamics |
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| A physical law which states that when energy is converted from one form to another, some of it is degraded into heat, a less usable form that disperses into the environment. |
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| The biological process that captures light energy and transforms it into the chemical energy or organic molecules, which are manufactured from carbon dioxide and water. |
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| The passage of energy in a one-way direction through an ecosystem. |
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| The totality of an organism's adaption , its use of resources, and the lifestyle to which it is fitted. |
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| An intimate relationship or association between members of two or more species; includes mutualism, commensalism, and parasites. |
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| The consumption of one species (the prey) by another (the predator). |
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| The interaction among organisms that vie for the same resources in an ecosystem (such as food or living space). |
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