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CodeVID-M4-WS
Matter & Its Changes — Practice Worksheet
Chapter: Matter & Its Changes
Topic: Matter & Its Changes
Maximum Marks: 25
Time: 30 minutes
Name: ____________________ Roll No.: __________ Date: ____________

General Instructions

  • All questions are compulsory.
  • Choose the correct option (A, B, C or D) for each question.
  • The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each) 15 × 1 = 15 marks
1.
A change that can be undone to get back the first thing is…
  • A.Permanent
  • B.Irreversible
  • C.Reversible
  • D.Burning
2.
Sugar stirred into water seems to vanish. We say it has…
  • A.Burned
  • B.Frozen
  • C.Melted by cold
  • D.Dissolved
3.
Even though dissolved sugar disappears from sight, we know it is still there because the water tastes…
  • A.Sweet
  • B.Sour
  • C.Salty
  • D.Of nothing
4.
A substance that dissolves in water is said to be…
  • A.Soluble
  • B.Insoluble
  • C.Frozen
  • D.Solid only
5.
Ice melting into water is caused by…
  • A.Quiet
  • B.Cold
  • C.Darkness
  • D.Heat
6.
In which state are the particles farthest apart and moving fastest?
  • A.Solid
  • B.Gas
  • C.Liquid
  • D.Ice
7.
Wet clothes dry because the water in them…
  • A.Melts
  • B.Freezes
  • C.Evaporates
  • D.Mixes
8.
Melting and freezing are opposite changes; both change the ___ of matter.
  • A.Colour
  • B.State
  • C.Name
  • D.Weight
9.
A change that cannot be undone is…
  • A.Freezing
  • B.Reversible
  • C.Melting
  • D.Irreversible
10.
A solid has a fixed shape and a fixed…
  • A.Colour only
  • B.Size (volume)
  • C.Smell
  • D.Sound
11.
Melting ice and freezing it again is a ___ change.
  • A.Reversible
  • B.Irreversible
  • C.Burning
  • D.Cooking only
12.
When a liquid turns into a gas (vapour), it is called…
  • A.Evaporation
  • B.Freezing
  • C.Melting
  • D.Mixing
13.
When a liquid is cooled and turns into a solid, it is called…
  • A.Boiling
  • B.Melting
  • C.Freezing
  • D.Dissolving
14.
Steam from boiling water turns to drops on a cool lid. This is…
  • A.Evaporation
  • B.Condensation
  • C.Melting
  • D.Freezing
15.
The three states of matter are solid, liquid and…
  • A.Gas
  • B.Light
  • C.Sound
  • D.Heat
Section B — Challenge / Olympiad (2 marks each) 5 × 2 = 10 marks
16.
Melting and freezing can be reversed. Frozen water can melt and then be frozen again, so they are ___ changes.
  • A.Burning
  • B.Irreversible
  • C.Permanent
  • D.Reversible
17.
A mixture of sand and water can be separated by ___ because sand does not dissolve.
  • A.Filtering
  • B.Boiling away the sand
  • C.Freezing
  • D.Burning
18.
Salt water left in a shallow dish in the Sun leaves salt behind because only the ___ evaporates.
  • A.Air
  • B.Salt
  • C.Heat
  • D.Water
19.
Iron slowly turning into reddish rust in damp air is an example of a change that is…
  • A.Irreversible
  • B.Reversible
  • C.Melting
  • D.Freezing
20.
Why can a liquid be poured but a solid cannot?
  • A.Liquids are colder
  • B.Solids are heavier
  • C.Liquid particles can slide past each other
  • D.Solids are wet

Answer Key

Section A — Multiple Choice (1 mark each)
  1. (C) Reversible
  2. (D) Dissolved
  3. (A) Sweet
  4. (A) Soluble
  5. (D) Heat
  6. (B) Gas
  7. (C) Evaporates
  8. (B) State
  9. (D) Irreversible
  10. (B) Size (volume)
  11. (A) Reversible
  12. (A) Evaporation
  13. (C) Freezing
  14. (B) Condensation
  15. (A) Gas
Section B — Challenge / Olympiad (2 marks each)
  1. (D) Reversible
  2. (A) Filtering
  3. (D) Water
  4. (A) Irreversible
  5. (C) Liquid particles can slide past each other
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