an ecosystem. A population Describe factors that survival and introduce the term Assess the importance is made up of all the affect the survival of of Mycorrhiza. ‘interdependence’. individuals of the same organisms in their Are humans hosts to How are species in a habitat. A habitat. parasites? contraceptives arriving community is made up of all Explain how one in the food chain? Is the mosquito a parasite? the populations of different species depends on Observe organisms in organisms that live in the Watch BBC video clip about others for survival. habitats and same habitat. food chains and Describe a stable suggest interdependence (see Feeding relationships within a community as one relationships. resources). community can be where all the species Use a model to describe represented by food chains. Construct food chains and and environmental food chains. All food chains begin with a identify the producer and factors are in balance, producer that synthesises consumers. Interpret population so population sizes molecules. This is usually a curves and explain remain fairly constant. Research producers that are green plant, which absorbs predator–prey Give an example of a not green plants. light to make glucose by stable community. photosynthesis. Interpret population curves. Explain what a food A food web can be used to WS 1.2 chain shows. understand the Interpret graphs used to model Explain that interdependence of species predator–prey cycles. photosynthetic within an ecosystem in terms organisms are the of food sources. producers of biomass Producers are eaten by for life on Earth. primary consumers, which in Identify producers, turn may be eaten by primary, secondary secondary consumers and then tertiary consumers.
an ecosystem. A population is made up of all the individuals of the same species in a habitat. A community is made up of all the populations of different organisms that live in the same habitat. Feeding relationships within a community can be represented by food chains. All food chains begin with a producer that synthesises molecules. This is usually a green plant, which absorbs light to make glucose by photosynthesis. A food web can be used to understand the interdependence of species within an ecosystem in terms of food sources. Producers are eaten by primary consumers, which in turn may be eaten by secondary consumers and then tertiary consumers. Describe factors that affect the survival of organisms in their habitat. Explain how one species depends on others for survival. Describe a stable community as one where all the species and environmental factors are in balance, so population sizes remain fairly constant. Give an example of a stable community. Explain what a food chain shows. Explain that photosynthetic organisms are the producers of biomass for life on Earth. Identify producers, primary, secondary survival and introduce the term ‘interdependence’. Are humans hosts to parasites? Is the mosquito a parasite? Watch BBC video clip about food chains and interdependence (see resources). Construct food chains and identify the producer and consumers. Research producers that are not green plants. Interpret population curves. WS 1.2 Interpret graphs used to model predator–prey cycles. Assess the importance of Mycorrhiza. How are contraceptives arriving in the food chain? Observe organisms in habitats and suggest Use a model to describe food chains. Interpret population curves and explain predator–prey relationships.