Predator-prey relationships | Science | Quizalize & Oak National Academy

Starter quiz

In a food chain diagram, animals can be:
- only producers
- only consumers ✓
- both producers and consumers
A food chain diagram is an example of a ______. These help us to understand difficult things more simply.
- 'model' ✓
Look at the food chain diagram. It shows four organisms. Match the organism with the word that describes its position in the food chain.
- cabbage
  
  ⇔
  
  producer ✓
- caterpillar
  
  ⇔
  
  primary consumer ✓
- chaffinch
  
  ⇔
  
  secondary consumer ✓
- cat
  
  ⇔
  
  tertiary consumer ✓
What is wrong with this food chain?
- The arrows are facing the wrong direction.
- The organisms are in the wrong order. ✓
- The sun is missing.
- There is no producer.
What is wrong with this food chain?
- The arrows are facing the wrong direction. ✓
- The organisms are in the wrong order.
- The sun is missing.
- There is no producer.
Look at the picture of this food chain diagram. Choose the correct statement.
- The food chain shows us the size of the populations.
- There are three organisms in the food chain.
- There are three populations in the food chain. ✓
- There are three consumers in this food chain.

A ______ is the number of organisms of one type that lives in a given area.
- 'population' ✓
Births, deaths and migration can all impact the size of a population. Match the words with how they are most likely to change the size of a population.
- births
  
  ⇔
  
  increase the size of a population ✓
- deaths
  
  ⇔
  
  decrease the size of a population ✓
- migration
  
  ⇔
  
  can increase or decrease the size of a population ✓
In this food chain diagram, which organism is the predator of the cod?
- algae
- shrimp
- cod
- seal ✓
- polar bear
The graph shows the size of a population of rabbits. Which of the following is most likely to explain the shape of the graph?
- There is lots of food available for the rabbits.
- There has been an outbreak of a disease. ✓
- There has been a natural disaster, for example a flood.
Which graph represents a predator-prey model?
- Graph A
- Graph B ✓
- Graph C
Arctic foxes are predators of arctic hares. The population of arctic hares increases. What will happen to the population of arctic foxes and why?
- The arctic fox population will decrease because there is less food to eat.
- The arctic fox population will decrease because there is more food to eat.
- The arctic fox population will increase because there is less food to eat.
- The arctic fox population will increase because there is more food to eat. ✓

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Predators are hunters and prey are hunted.
Different factors can affect the population sizes of predators and prey (e.g. disease).
There is a relationship between the predator and prey population sizes, each is impacted by changes in the other.

The change in the size of a population will only affect another population if they are predator-prey

Ensure that pupils are given opportunities to see how changes in population size impact all other organisms in the food chain.

Predator - An animal that hunts and eats another animal.
Prey - An animal that is caught and eaten by another animal.
Population - A group of organisms of the same type, in the same place, is called a population.