The cards Question What is an ecosystem? Tap to flip Answer All the living organisms in a place, interacting with each other and with their non-living surroundings. Question What is a population? Tap to flip Answer A group of organisms of the same type living in the same place. Question What is a community? Tap to flip Answer All the organisms that live in the same place. Question What are biotic factors? Tap to flip Answer The living components of an ecosystem. Question What are abiotic factors? Tap to flip Answer The non-living components of an ecosystem. Question How do the population sizes of predators and prey change over time? Tap to flip Answer They rise and fall in predator-prey cycles. Question If the population size of one organism in an ecosystem changes, which organisms are affected? Tap to flip Answer All the organisms in the ecosystem, to varying degrees. Question What is a classification key? Tap to flip Answer A series of questions about organisms' features that helps classify them correctly. Question Why is sampling used to estimate the size of a population? Tap to flip Answer It is not possible to count all the organisms in a population. Question What is a quadrat? Tap to flip Answer A square frame used to sample populations of plants or slow-moving animals. Question What is abundance? Tap to flip Answer The number of organisms of a species found within a habitat. Question Why can quadrats be placed at random? Tap to flip Answer To help avoid bias. Question Why does a single quadrat survey not give a full picture of a habitat? Tap to flip Answer It is only a snapshot of one area at one time; samples taken over a long period give a fuller picture. Question What is a transect? Tap to flip Answer A straight line across a habitat used to make measurements and observations. Question What is the distribution of a species? Tap to flip Answer The geographical area in which the species can be found. Question Give one abiotic factor that can be measured in a habitat. Tap to flip Answer For example, light level, temperature, soil moisture or pH. Question What is a belt transect? Tap to flip Answer A transect with quadrats placed along the straight line to measure distribution and abundance. Question Must quadrats always be placed randomly? Tap to flip Answer No; they can be placed systematically, which is regular rather than random sampling. Question What is competition? Tap to flip Answer When organisms in a community or population seek the same limited resource. Question Give one resource that organisms compete for. Tap to flip Answer For example, food, water, space, shelter, light, mates, pollinators or seed dispersers. Question What does it mean that the populations in a community are interdependent? Tap to flip Answer They rely on and affect one another. Question What are physiological adaptations? Tap to flip Answer Body processes that help an organism survive and reproduce. Question What is an extremophile? Tap to flip Answer An organism able to survive and reproduce in extreme environments, e.g. very hot or very cold. Question Can organisms adapt quickly to a change in where they live? Tap to flip Answer No; changes take time to evolve, and slowly reproducing organisms may respond too slowly to avoid extinction. Question What is a decomposer? Tap to flip Answer An organism that feeds on the remains of other living organisms (organic matter). Question What is decay? Tap to flip Answer The breakdown (rotting) of organic matter by bacteria, fungi or other organisms. Question Which organisms are responsible for decomposing plant and animal material? Tap to flip Answer Microorganisms and detritivores (detritus feeders). Question Why is decay needed in an ecosystem? Tap to flip Answer To keep nutrients cycling around the ecosystem. Question What is compost made of? Tap to flip Answer Decomposed plant and animal material. Question How is biogas produced? Tap to flip Answer By anaerobic digestion of waste material. Question Which gas in biogas can be harvested and used as a fuel? Tap to flip Answer Methane. Question What do decomposers return to the soil for plants to use? Tap to flip Answer Minerals (not energy). Question What is an enzyme? Tap to flip Answer A protein that acts as a biological catalyst, speeding up a reaction without being used up. Question Why does temperature affect the rate of decomposition? Tap to flip Answer It affects the rate of enzyme-controlled reactions. Question Why does the availability of water affect the rate of decomposition? Tap to flip Answer Microorganisms need water to survive. Question What is the active site of an enzyme? Tap to flip Answer The part of the enzyme where the substrate binds. Question What does it mean when an enzyme is denatured? Tap to flip Answer Its shape has changed permanently, which stops it working. Question How is rate calculated from the time taken to reach the end point? Tap to flip Answer Rate = 1/time taken to reach the end point. Question In what form is carbon found in the atmosphere? Tap to flip Answer Carbon dioxide. Question By which process do plants remove carbon dioxide from the atmosphere? Tap to flip Answer Photosynthesis. Question Give one way carbon is returned to the atmosphere. Tap to flip Answer For example, burning fossil fuels or the decay of dead plant and animal material. Question What is evaporation? Tap to flip Answer The change of a substance from a liquid to a gas. Question What is condensation? Tap to flip Answer The change of state from a gas to a liquid. Question What is transpiration? Tap to flip Answer The loss of water vapour from plant leaves, through the stomata. Question What is precipitation? Tap to flip Answer Water falling from clouds as rain, sleet, snow or hail. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Biology Unit Living organisms and their environments Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Biology lesson by Oak National Academy licensed under Open Government Licence (OGL)
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