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Learning objective

Assess whether an object will float or sink based on its density compared to the density of the fluid it is in.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE PhysicsMotion, forces and energyCore content

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Quick explanation

Assess whether an object will float or sink based on its density compared to the density of the fluid it is in

  • This point belongs to Density, especially Density outcomes.
  • You need to be able to assess whether an object will float or sink based on its density compared to the density of the fluid it is in.
  • The key ideas to know are Determine and Explain.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DetermineExplain

Why it matters

This objective helps connect Density outcomes to exam-style questions, flashcards, and revision notes for Density.

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Practice Questions7 linked questions

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Paper 3 structured question: Density

Paper 3Theory (Core)1 marks

Description

Wood Block in Water

The block of wood is placed in a container filled with water.

  1. a

    State whether the block will float or sink in water.

    Aim for approximately 1 distinct marking point.

    [1]
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