4.1 Understand the terms population, community, habitat and ecosystem.
Population: Number of individuals in a particular species.
Community: Populations of different species interacting.
Habitat: The area where a population lives.
Ecosystem: A community in a particular habitat made up of different populations interacting with in the habitat.
Community: Populations of different species interacting.
Habitat: The area where a population lives.
Ecosystem: A community in a particular habitat made up of different populations interacting with in the habitat.
4.2 Explain how quadrats can be used to estimate the population size of an
organism in two different areas.
About quadrats:
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4.3 Explain how quadrats can be used to sample the distribution of organisms in
their habitats.
A sample square is taken at random.
The number of a population in that square is taken.
This is repeated in different areas and compared to show where populations are dense and not.
The number of a population in that square is taken.
This is repeated in different areas and compared to show where populations are dense and not.