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Key Area 3.2

Revision for Key area 3.2 Distribution of organisms

QuestionAnswer
Name two abiotic factors Light intensity, temperature, soil pH, soil moisture
Name two biotic factors Predation, competition, food availability, disease, grazing
Name the equipment used to measure temperature Thermometer
Name the equipment used to measure light intensity Light meter
Name the equipment used to measure soil pH pH meter
Name the equipment used to measure soil moisture moisture meter
What piece of equipment would you use to measure the population of flowers in a field Quadrat
Name the sampling technique used to measure insect populations Pitfall trap
State one way to avoid a source of error when measuring temperature Give time to reach correct temperature
State one way to avoid a source of error when measuring soil pH Clean and dry the probe before and after each use
State one way to avoid a source of error when measuring light intensity Do not shadow the light meter
What sampling technique involves taking a line right across an area that you are sampling and counting the number of each species you find at regular intervals. Transect line
What could limit the results from a pitfall trap? Predators eating any trapped insects, not remembering where the trap was placed, species can be misidentified, drainage hole may not have been placed causing it to flood.
Name the key used to identify organisms Paired statement key
What does HIPPO stand for? Main factors affecting biodiversity: Habitat change, Invasive species, Pollution, Population growth, Over-harvesting
What is an indicator species? An indicator species is a species that shows how polluted or unpolluted an environment is through their presence or absence.
What would happen to the population of lichen as population levels increased? The population of lichen would decrease
Name one freshwater invertebrate found in clean, non-polluted water Stone fly nymph, mayfly nymph
Name one freshwater invertebrate found in polluted water Bloodworms, rat-tailed maggots
Created by: MissBryce
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