1 markThe diagram below shows a food chain
grass → locusts → snakes → eagles
If the number of snakes decreases due to disease, what will happen to the numbers of the other organisms in the food chain?
| grass | locusts | eagles | |
| A | increase | increase | increase |
| B | increase | decrease | increase |
| C | decrease | decrease | decrease |
| D | decrease | increase | decrease |
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1 markThe diagram below illustrates part of the carbon cycle.
Which process is shown by the arrow labelled Y?
Photosynthesis
Feeding
Respiration
Combustion
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1 markWhich of the following options shows four ecological terms in a logical order, starting with the smallest and ending with the largest?
individual → community → population → ecosystem
population → individual → ecosystem → community
community → population → ecosystem → individual
individual → population → community → ecosystem
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1 markThere are different levels of organisation within an ecosystem.
What is the correct order of these levels?
individual, community, population, ecosystem
community, individual, ecosystem, population
individual, population, community, ecosystem
population, community, ecosystem, individual
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1 markOrganisms in an ecosystem are affected by biotic factors.
Which term is a biotic factor?
Disease
Light intensity
Rainfall
Wind speed
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1 markWhich of these is an abiotic factor that can affect organisms?
Food availability
Light intensity
Pathogens
Predators
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1 markThe diagram shows the water cycle.
Which label, A, B, C or D, represents evaporation?
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1 markWhich relationship describes an organism living on an animal and harming it?
Decomposition
Mutualism
Parasitism
Predation
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1 markWhich process in the carbon cycle takes in carbon dioxide from the air?
Combustion
Decomposition
Photosynthesis
Respiration
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1 markWhich is the correct definition of a parasite?
An organism that is always at the top of a food chain.
An organism that kills and eats another organism.
An organism that lives on another living organism so that they both benefit.
An organism that lives on or in another living organism causing it harm.
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1 markThe diagram shows part of a cycle in an ecosystem.
What is the name of the cycle shown in the diagram?
Carbon cycle
Hydrogen cycle
Nitrogen cycle
Sulfur cycle
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1 markGoldfish are a species of fish.
What name is given to all the goldfish living in a pond?
A community
An ecosystem
A habitat
A population
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