Biosphere - Entire surface of the Earth and its organisms, Ecosystem - Dynamic system of organisms that interact with each other and their environment which is made up of biotic and abiotic factors, Biotic factors - Living and once living things - such as plants, animals, microorganisms - in an ecosystem, Abiotic factors - Non-living things – such as temperature, water, soil, climate – in an ecosystem, Community - Populations of organisms living together in the same habitat, Population - Group of organisms of the same species in the same area, Multicellular organism - Individual composed of many specialised cells (eg. a human or ant), Cell - The smallest unit of life, Ecology - The study of ecosystems, Habitat - Place where a population of organisms live,

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