Learning objectives

Knowledge

  • To model how natural selection affects population size.

Working scientifically

  • To evaluate the degree of trust and pose new questions for further enquiry.

Success criteria

Knowledge

  • I can describe
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National curriculum

Science

Evolution and inheritance

Pupils

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Before the lesson

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Lesson plan

Recap and recall

Arrange the children in pairs and hand out whiteboards and pens (one between two). Display the Presentation: Penguin adaptations and ask the children to list any variation they can see.

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Adaptive teaching

Pupils needing extra support

Should use the Activity: Modelling natural selection: support version that provides prompts for summarising results and a writing frame for completing an evaluation.

Pupils working at greater depth

Could use the additional row in the results table to test another model beak (e.g. alternative tweezers, chopsticks or tongs) and compare further data; should consider other factors that may affect which bird will survive when discussing or writing a conclusion (including other animals competing for the same food or a predator that hunts the animal as its prey); could design a beak shape that is even better adapted to the rice-shaped food.

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Assessing progress and understanding

Pupils with secure understanding indicated by: describing relevant variation in a given

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Knowledge outcomes

  • I can describe variation in a given population, such as the different shaped beaks of finches.
  • I can explain how variation may affect survival within a population, such as some beaks being better adapted to pick up food than others.
  • I can recall that natural selection is the process where living things better adapted to their habitat are more likely to survive, whereas those less well adapted are more likely to die.
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Vocabulary definitions

  • anomaly

    A result that does not fit the pattern.

  • competition

    When an organism is trying to be more successful at something, such as escaping predators or finding food.

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