GCSEPhysicsOCR GatewayExam Questions1. Matter1.3 Pressure

Pressure (OCR Gateway GCSE Physics)

Exam Questions

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1.3 Pressure

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1.3 Pressure

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11 mark

What is the gravitational field strength at the Earth’s surface?

  • 10 N/kg

  • 16 N/kg

  • 50 N/kg

  • 230 N/kg

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21 mark

A sealed boiling tube contains gas.
The boiling tube is heated.

q1-paper1-june2098-ocr-gcse-physics

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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31 mark

A cylinder contains a gas.

The volume of the gas is halved and the temperature remains the same.

What happens to the pressure of the gas?

  • It remains the same.

  • It halves.

  • It doubles.

  • It quadruples.

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41 mark

Which factor influences whether an object floats or sinks?

  • Size of object

  • Depth of water

  • Distance from the shore

  • Density of object

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11 mark

A syringe contains air.
q4-paper1-specimen-ocr-gcse-physicsThe piston is pushed inwards.

How do the pressure and volume of the air in the syringe change?

  Pressure Volume
A decreases decreases
B decreases increases
C increases decreases
D increases increases

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    21 mark

    These statements are about pressure and volume of a gas.

    Which statement is correct?

    • Volume doubles, pressure doubles

    • Volume doubles, pressure halves

    • Volume halves, pressure halves

    • Volume halves, pressure stays constant

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    31 mark

    Which statement explains why atmospheric pressure changes as you climb up a mountain?

    • Number of air molecules above you decrease the further you move from the centre of the Earth.

    • Density of air increases the further you move from the centre of the Earth.

    • Gravity increases the further you move from the centre of the Earth.

    • Temperature decreases the further you move from the centre of the Earth.

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    41 mark

    Higher Tier Only

    What is the change in pressure when a diver moves from a depth of 3.0 m to a depth of 8.0 m?

    Assume gravitational field strength on Earth = 10 N/kg and water density = 1000 kg/m3.

    Use an equation from the data sheet to help you.

    • 30 000 Pa

    • 50 000 Pa

    • 80 000 Pa

    • 110 000 Pa

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    51 mark

    A fluid is compressed by pushing the plunger into the body of a sealed syringe.

    q3-paper3-june2018-ocr-gcse-physics

    Which of these statements is true?

    • There is a net force towards the plunger.

    • There is no force towards the nozzle.

    • There is a force parallel to all points on the surface of the fluid.

    • There is a force at 90° to all points on the surface of the fluid.

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    11 mark

    A sealed can contains gas.

    The can is heated and the pressure of the gas increases.

    How do the gas particles cause this increase in pressure?

    • The average distance between the particles increases.

    • The particles expand.

    • The particles hit each other more frequently.

    • The particles hit the can more frequently.

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