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AQA GCSE Biology Topic 7 - Ecology




 Below is everything the examiners think you know, if you're not sure of something click on the link to watch my YouTube video explanation. For a copy of these you can print off, get the FREE revision guide I wrote for you.

·         I can describe the levels of organisation in an ecosystem
·         I can define the term community
·         I can describe interdependence in a community
·         I can describe competition in a community
·         I can define the term ecosystem
·         I can describe what an organism needs to survive and reproduce
·         I can describe what different organisms compete for
·         I can define the term abiotic factor
·         I can recall a list of abiotic factors including; light intensity, temperature, water levels, pH, ion content, wind, carbon dioxide and oxygen level

·         I can describe how a change in abiotic factors could affect a community
·         I can define the term biotic factor
·         I can describe how a change in biotic factors could affect a community
·         I can recall a list of biotic factors including; food, predators and pathogens.
·         I can define the term adaptation
·         I can describe why animals and plants need adaptations
·         I can define the term extremophile
·         I can give examples of plant and animal adaptations
·         I can describe where the biomass on Earth comes from
·         I can draw a food chain
·         I can explain where the energy is a food chain comes from
·         I can describe how to use a quadrate
·         I can describe how to use a transect
·         I can describe how to determine the abundance and distribution of species in an ecosystem
·         I can define the term producer
·         I can define the term primary consumer
·         I can define the term secondary consumer
·         I can define the term tertiary consumer
·         I can define the term prey
·         I can recall that materials are recycled through biotic and abiotic part of an ecosystem and provide building blocks for the future.
·         I can describe the role of microorganisms in cycling materials
·         I can define the terms decay and decomposition    Biology only
·         I can describe how differences in temperature can affect the rate of decompositionBiology only
·         I can describe how differences in oxygen can affect the rate of decomposition    Biology only
·         I can describe how differences in water can affect the rate of decomposition  Biology only
·         I can explain why gardeners compost Biology only
·         I can describe how decay can lead to the production of biogasBiology only
·         I can evaluate the impact of environmental changes (including temperature, water and the atmosphere) on the distribution of a species  Biology only
·         I can define the term biodiversity
·         I can explain the needs for biodiversity
·         I can describe the impact that humans have on biodiversity
·         I can explain the rise in pollution
·         I can describe the range of different sources of pollution, including; in water, in air and in land
·         I can describe the effect that pollution has of plants and animals
·         I can describe the impact that humans have on land use and the effect this has on plant and animal life

·         I can describe the impact of deforestation
·         I can recall the reasons for deforestation
·         I can describe the biological consequences of global warming
·         I can describe how humans can have a positive and a negative impact on biodiversity
·         I can discuss the range of programmes that aim to reduce the negative effect of humans on biodiversity
·         I can define the term trophic level Biology only
·         I can use number to represent trophic level    Biology only
·         I can describe the differences between the trophic levels Biology only
·         I can describe the role of decomposers  Biology only
·         I can construct a pyramid of biomass Biology only
·         I can interpret a pyramid of biomass   Biology only
·         I can explain how energy is lost between trophic levels   Biology only
·         I can recall that roughly 10% of the energy is transferred to the next trophic level   Biology only
·         I can define the term food security   Biology only
·         I can explain the factors affecting food security  Biology only
·         I can describe the need to find sustainable methods for food production  Biology only
·         I can describe ways to improve the efficiency of food productionBiology only
·         I can describe why some farmers use high protein foods Biology only
·         I can describe the need for sustainable fisheriesBiology only
·         I can explain the methods used to keep fish stocks at a sustainable level Biology only
·         I can describe the advances in biotechnology as they apply to agriculture  Biology only
·         I can describe that microorganism can be cultured for food    Biology only