Food Chains and Webs 01
Plants produce their own food by photosynthesis and are known as producers.

Food Chains and Webs 01

Find out about food chains and webs in this KS3 Science quiz. A food chain shows the dependency of organisms on other organisms as a source of food. It shows how energy is transferred in a habitat. A food web is just a lot of food chains linked together - it gives a more complete picture of what eats what in a natural habitat. All food chains begin with a plant, plants are called producers. They produce their own food by the process of photosynthesis and are the source of energy for the entire food chain. Animals in a food chain are consumers as they need to eat plants and other animals.

An animal that eats only plants is a herbivore and can be referred to as a primary consumer. Animals that eat other animals are either carnivores (only eat other animals, never eat plants) or omnivores (eat both animals and plants). A secondary consumer is an animal that eats herbivores and a tertiary consumer is an animal that eats secondary consumers. As you go up a food chain, there is less and less energy available which is why there are fewer tertiary consumers than secondary consumers.

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  1. Plants are:
    Plants produce their own food by photosynthesis
  2. Secondary consumers are usually:
    They can also be omnivores
  3. Omnivores eat:
    Herbivores eat plants. Carnivores eat animals (meat)
  4. Which of the following do you think is the odd one out in terms of their diet?
    The others are herbivores; a blackbird is an omnivore
  5. Which of the following shows a correct food chain?
    A food chain always starts with a plant
  6. In the following food chain 'lettuce → rabbit → hawk', the rabbit is:
    A food chain ends at the top carnivore
  7. In the following food chain 'grass → grasshopper → rat → snake → hawk', the rat is:
    It eats grasshoppers which are primary consumers
  8. In the food chain 'grass → grasshopper → rat → snake → hawk', the hawk is .......
    Nothing eats the hawk - hunting and catching it would take more energy than the predator would get from eating the hawk
  9. Rabbits and slugs eat lettuce. Hedgehogs eat slugs. Foxes eat rabbits. The rabbits get poisoned and many die. Which of the following is most likely to happen first?
    The slugs do not have as much competition when the rabbits have died so there is more slug food. More food means that a larger population of slugs can be supported in the food chain. More slugs mean more hedgehogs etc up the food chain
  10. Which of the following statements is NOT correct?
    They always show which way the energy is passing. In other words, they will always point towards the animal that is doing the eating and away from whatever is being eaten

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