Skip to content
QuizQuip
Sign up
Back to Chapter 7
Mark schemePDF

Chapter 7 Practice Paper: Kinetic Particle Model of Matter — question paper

QuizQuipPractice Series
QQ/S3PH/CH7

Secondary 3 · Physics (G2 / G3)

Chapter 7 Practice Paper

Kinetic Particle Model of Matter

Duration: 40 minutes
Total: 30 marks
Name:
Class:
Register No.:
Date:

READ THESE INSTRUCTIONS FIRST

  • Write your name, class and register number in the spaces at the top of this page.
  • Answer all questions.
  • Give numerical answers correct to 3 significant figures unless stated otherwise, with units where a quantity is calculated.
  • Take the acceleration of free fall g as 10 m/s² unless stated otherwise.
  • The number of marks is given in brackets [ ] at the end of each question or part question.
  • The total number of marks for this paper is 30.

Original practice material written for the MOE Physics syllabus. It is not an official MOE or school examination paper. States of matter, the kinetic particle model, Brownian motion, temperature and gas pressure.

For Examiner’s Use
Section A/ 10
Section B/ 20
Total/ 30

Section A: Multiple-choice questions[10 marks]

Choose the one correct answer for each question.

  1. 1

    Which statement about the particles of a gas is correct?

    1. AThey move randomly at high speed with large separations.
    2. BThey are packed regularly and slide slowly past one another.
    3. CThey vibrate about fixed positions.
    4. DThey are held together by strong chemical bonds and cannot move.
    ( )
  2. 2

    A smoke cell is viewed under a microscope. The bright specks of smoke

    1. Adrift steadily in one direction
    2. Bjiggle randomly and continuously
    3. Cstay perfectly still
    4. Dsink slowly to the bottom in straight lines
    ( )
  3. 3

    Heating a solid raises its temperature because

    1. Athe particles expand
    2. Bthe particles vibrate with more kinetic energy
    3. Cnew particles enter the solid
    4. Dthe particles stop moving briefly
    ( )
  4. 4

    A sealed can of gas is cooled. The pressure inside falls because the molecules

    1. Abecome smaller
    2. Bstick to the can walls
    3. Cmove more slowly, hitting the walls less often and less hard
    4. Dturn into a liquid immediately
    ( )
  5. 5

    Which change of state needs energy input?

    1. Asolidification
    2. Bcondensation
    3. Call three release energy
    4. Dmelting
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 1

    The three common states of water are compared in a school laboratory.

    Observations of water in three states

    PropertyIceLiquid waterSteam
    Shapefixedtakes the containerfills the container
    Flownoyesyes
    Compressibilityalmost nonealmost noneeasily compressed
    1. (a)

      Describe the arrangement, separation and motion of the particles in ice.

      [2]
    2. (b)

      Explain, using particles, why liquid water flows but ice does not.

      [2]
    3. (c)

      Explain why steam is easily compressed but liquid water is not.

      [2]
  2. 2

    A student observes a smoke cell with a microscope. The bright specks move in short, jerky, random hops that never stop, even hours later.

    1. (a)

      Name the effect she observes.

      [1]
    2. (b)

      Explain what causes the jerky movement of the specks.

      [3]
    3. (c)

      State what this experiment provides evidence for.

      [1]
    4. (d)

      The cell is gently warmed. State and explain what happens to the specks’ motion.

      [2]
  3. 3

    A rigid spray can is labelled "do not incinerate". It contains gas under pressure at room temperature.

    1. (a)

      Explain, in terms of particles, how the gas exerts pressure on the can walls.

      [3]
    2. (b)

      Explain why the label warns against heating the can.

      [3]
    3. (c)

      A different can is fitted with a movable piston instead. State what happens to the piston if the gas inside is heated at constant pressure.

      [1]

— End of paper —