GCSEPhysicsOCRPhysics A (Gateway)Exam Questions1. MatterThe Particle Model

The Particle Model (OCR GCSE Physics A (Gateway)): Exam Questions

Exam code: J249

54 mins15 questions

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The Particle Model

11 mark

Different states of matter have different densities.

Which of the following shows the states of matter in density order, starting with the lowest density?

  • Solid – liquid – gas

  • Solid – gas – liquid

  • Gas – liquid – solid

  • Liquid – gas – solid

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21 mark

A sealed boiling tube contains gas.

The boiling tube is heated.

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What happens?

  • The particles in the gas evaporate.

  • The particles in the gas expand.

  • The particles in the gas move faster.

  • The particles in the gas move slower.

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3
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Which diagram shows the correct model of an atom?

Four diagrams labelled A to D illustrating atomic models with notes indicating electrons, protons, and neutrons.

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    41 mark

    Which of the following statements gives the correct definition of density?

    • The mass per unit volume of a material

    • The force per unit area acting on a material

    • The mass per unit area of a material

    • The force per unit volume of a material

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    51 mark

    An object has a volume of 1.5 m3 and a mass of 3.0 kg.

    What is the density of the object?

    Use the equation: density = mass ÷ volume

    • 0.5 kg/m3

    • 2.0 kg/m3

    • 4.5 kg/m3

    • 6.0 kg/m3

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    61 mark

    A graduated syringe contains air at room temperature.

    The syringe is put in a freezer to cool it down.

    When it is removed from the freezer, the piston has moved inwards.

    q6-paper3-specimen-ocr-gcse-physics

    The density of the air in the syringe when cooled is 2.4 kg/m3.

    What was the density of the air at room temperature?

    • 0.6 kg/m3

    • 1.2 kg/m3

    • 2.4 kg/m3

    • 4.8 kg/m3

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    71 mark

    The atomic model has changed over time.

    Why did the model need to change over time?

    • Models only have a finite lifetime

    • Computers were invented

    • The older models could not explain new evidence

    • Peer review

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    8
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    Which diagram shows the correct arrangement of particles in a liquid?

    Four diagrams labelled A, B, C, and D show varying densities of circles inside rectangles, with A most dense and C least dense.

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      91 mark

      A piece of metal has a volume of 2.0 × 10-5 m3.

      The density of the metal is 8.0 × 103 kg/m3.

      What is the mass of the metal?

      • 2.5 × 10-3 kg

      • 4.0 × 10-2 kg

      • 1.6 × 10-1 kg

      • 1.6 × 103 kg

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      10
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      Which of the following represents the magnitude of the typical radius of an atom?

      • 1.6 × 10–19 m

      • 2.8 × 10–15 m

      • 1 × 10–10 m

      • 10 × 10–10 m

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