Page 145 - Knowledge Organiser Yr8 24-25

Knowledge Base: Science 8.9 Ecosystems Year 8
3. Biodiversity Survey : Analysing data
3.1
What is a frequency chart?
A method of recording total populations using a tally
3.2
What is a bar chart?
A bar chart is a type of graph used to represent a non-numerical or discontinuous set of data.
4. Food Chains
4.7
Define the term primary consumer.
The first consumer in the food chain. They only eat producers.
4.8
Define the term secondary consumer.
The second consumer in the food chain.
4.9
Define the term tertiary consumer
The third consumer in the food chain
4.10
Define the term herbivore
Organisms that eat only plants
4.11
Define the term omnivore
Organisms that eat plants and meat
4.12
Define the term carnivore
Organisms that eat only meat
3.3 What is primary data?
Data that you have collected yourself
3.4
What is secondary data?
Data that has been collected by someone else and made available to you
3.5
How do you calculate the mean of a set of values?
Add the total of the values and divide by the number of values
4. Food Chains
4.1
Where does the energy in a food chain come from
The sun
4.2
What do arrows in a food chain represent?
The transfer of energy
4.3
What is each stage in a food chain called?
A trophic level
4.4
What does a food chain show?
The feeding relationships between living organisms
4.13 Identify the producer in the food chain
4.14 Identify the primary consumer in the food chain
4.15 Identify the secondary consumer in the food chain
Grass Grasshopper Shrew
4.5 What do food chains begin with?
A producer
4.6
Define the term producer.
Organisms that make glucose by photosynthesis (e.g. Plants)
Example of a food chain
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