Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What is an abiotic factor?
   • An abiotic factor is a non-living factor.
2. What abiotic (non-living) factors affect a community?
   • Abiotic (non-living) factors which can affect a community are: light intensity temperature moisture levels soil pH and mineral content wind intensity and direction carbon dioxide levels for plants oxygen levels for aquatic animals.
3. What is a biotic factor?
   • A living factor.
4. What types of Biotic (living) factors affect a community?
   • Biotic (living) factors which can affect a community are: ? availability of food ? new predators arriving ? new pathogens ? one species outcompeting another so the numbers are no longer sufficient to breed.
5. What are the producers of biomass for life on Earth?
   • photosynthetic organisms are the producers of biomass for life on Earth.
6. How can feeding relationships be represented?
   • Feeding relationships within a community can be represented by food chains.
7. What do all food chains begin with?
   • Food chains begin with a producer which synthesises molecules. This is usually a green plant or alga which makes glucose by photosynthesis.
8. What is the difference between mean, mode and median?
   • Mean = add all the repeats up and divide by the number of repeats. Mode = the number that occurs the most. Median = the middle number when all repeats are put in order from smallest to largest
9. What is the order of energy transfer between secondary consumer, tertiary consumer, producer and primary consumer
   • producer -> primary consumer -> secondary consumer -> tertiary consumer.
10. What is an organism that eats a consumer called? What is a consumer that is eaten by another consumer called?
    • Predator eats another consumer. Prey are consumers that are eaten by another consumer.
11. What is a predator-prey cycle?
    • In a stable community the numbers of predators and prey rise and fall in cycles, dependent on the numbers of each.