Food chains & Foodwebs
This lesson covers:
- What food chains show
- What 'producers', 'primary consumers', 'secondary consumers', and 'tertiary consumers' are
- What food webs show
A model that shows how energy passes from organism to organism is called a .
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Organisms at the very start of a food chain that can create glucose using photosynthesis are known as .
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Which two of the following groups of organisms are producers?
Algae
Herbivores
Apex predators
Plants
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Which resource do plants not compete for?
Space
Light
Food
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What do primary consumers feed on?
Decomposers
Producers
Secondary producers
Other primary consumers
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consumers are organisms that eat secondary consumers.
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As energy passes along a food chain, most of the energy is _________.
conserved
lost
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Which is the secondary consumer in the following food chain?
tree → caterpillar → shrew → owl
Caterpillar
Owl
Shrew
Tree
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What is a predator?
An animal that is hunted and killed for food by another animal
An animal that hunts and kills other animals for food
An animal that makes its own food
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An organism that is killed and eaten by a predator is known as .
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The diagram above shows the predator-prey cycle between snakes and rabbits.
increasing / decreasing
- At time X, the number of predators is because there is a lot of prey.
- At time Y, the number of predators is because there is less prey.
- At time Z, the number of prey is because there are now more predators.
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