S1 Science: States Of Matter And The Particle Model (Paper 4 (error Clinic))

S1 Science: States of Matter and the Particle Model (Paper 4 (error clinic))

2026-11-14

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Tutor Prep Guide · The three states, particle arrangement and motion, changes of state and latent heat

S1 Science: States of Matter and the Particle Model (Paper 4 (error clinic))

This paper targets the usual errors: fixed shape against fixed volume, freezing and boiling points, when evaporation happens, the constant temperature while boiling and conservation of mass.

Direct answers　Add one line explaining why after each answer, which separates a lucky guess from real understanding. When the word particle appears, think of arrangement, spacing and speed of motion, because most answers lie in those three points.

01　Paper details (check answers afterwards)

Item	Detail
Questions	10
Suggested time	20
Difficulty mix	Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1
Chapter	Chapter: S1 Science: States of Matter and the Particle Model
Level	S1

02　Questions (10 items)

FoundationWhat are the three states of matter?
FoundationWhat is the freezing point of water at standard pressure?
FoundationWhat is the boiling point of water at standard pressure?
IntermediateDoes a liquid have a fixed volume and a fixed shape?
IntermediateThe temperature rises from 20 °C to 80 °C. By how many degrees?
IntermediateWhat happens to the particles of a substance when it is heated?
ChallengeA student says evaporation only happens at 100 °C. Is that right?
Challenge150 g of water freezes completely. What is the mass of the ice?
ChallengeOne third of 300 mL of water evaporates. How much is left?
Error redoA student answers that gas particles are not moving. What is the correct answer?

03　Answers and one-line notes

#	Answer	One-line note
1	Solid, liquid and gas	The three states differ in how the particles are arranged and how fast they move.
2	0 °C	At 0 °C water turns from liquid to solid, which is freezing.
3	100 °C	While water boils the temperature stays at the boiling point of 100 °C.
4	It has a fixed volume but no fixed shape	Liquid particles slide past each other so the shape changes, but the spacing stays fixed so the volume does not.
5	60 °C	80 minus 20 is 60, so the rise is 60 °C.
6	They move faster and the distance between them increases	A higher temperature means more average kinetic energy, so the particles vibrate or move faster.
7	No, evaporation happens at any temperature	Surface particles escape whenever they have enough energy, without reaching the boiling point.
8	150 g	A change of state keeps the same particles, so the mass is unchanged at 150 g.
9	200 mL	Two thirds of 300 is 200, so 200 mL remains.
10	Gas particles move randomly all the time	Particles in every state move, and gas particles are the fastest and furthest apart.

04　What to do after marking

After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
Repeat the same item two days later; move to the next paper only when both attempts are correct.
Parents only need the answer and note columns; there is no need to explain every item.

For particle model questions ask three things: which state the substance is in, how closely the particles are packed, and how their motion changes on heating or cooling.Tutor Registration →

Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.