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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.
Sugar dissolves faster in water that is…
  • A.Oily
  • B.Icy cold and still
  • C.Frozen
  • D.Warm and stirred
2.
When a liquid turns into a gas (vapour), it is called…
  • A.Evaporation
  • B.Freezing
  • C.Melting
  • D.Mixing
3.
What speeds up evaporation?
  • A.Quiet
  • B.Cold
  • C.Darkness
  • D.Heat and wind
4.
When vapour cools and turns back into a liquid, it is called…
  • A.Evaporation
  • B.Condensation
  • C.Melting
  • D.Freezing
5.
A solid has a fixed shape and a fixed…
  • A.Colour only
  • B.Size (volume)
  • C.Smell
  • D.Sound
6.
A change that cannot be undone is…
  • A.Freezing
  • B.Reversible
  • C.Melting
  • D.Irreversible
7.
Cooking an egg is ___ because you cannot get the raw egg back.
  • A.Melting
  • B.Reversible
  • C.Irreversible
  • D.Mixing only
8.
Water freezes into ice when it is made very…
  • A.Cold
  • B.Hot
  • C.Bright
  • D.Loud
9.
Sand does not dissolve in water, so sand is…
  • A.A gas
  • B.Soluble
  • C.Insoluble
  • D.Frozen
10.
The three states of matter are solid, liquid and…
  • A.Gas
  • B.Light
  • C.Sound
  • D.Heat
11.
Sugar stirred into water seems to vanish. We say it has…
  • A.Burned
  • B.Frozen
  • C.Melted by cold
  • D.Dissolved
12.
Melting ice and freezing it again is a ___ change.
  • A.Reversible
  • B.Irreversible
  • C.Burning
  • D.Cooking only
13.
A gas spreads out to fill…
  • A.Nothing
  • B.A fixed shape
  • C.Only a cup
  • D.All the space it can
14.
Butter left in a hot pan turns runny. This change is…
  • A.Mixing
  • B.Freezing
  • C.Melting
  • D.Burning
15.
Ice melting into water is caused by…
  • A.Quiet
  • B.Cold
  • C.Darkness
  • 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.
Mixing flour, water and baking it into a cake is irreversible because a ___ substance is formed.
  • A.Cold
  • B.New
  • C.Frozen
  • D.Wet
18.
We can get the salt back from salty water by letting the water…
  • A.Freeze the salt away
  • B.Evaporate, leaving the salt
  • C.Burn
  • D.Dissolve more
19.
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
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. (D) Warm and stirred
  2. (A) Evaporation
  3. (D) Heat and wind
  4. (B) Condensation
  5. (B) Size (volume)
  6. (D) Irreversible
  7. (C) Irreversible
  8. (A) Cold
  9. (C) Insoluble
  10. (A) Gas
  11. (D) Dissolved
  12. (A) Reversible
  13. (D) All the space it can
  14. (C) Melting
  15. (D) Heat
Section B — Challenge / Olympiad (2 marks each)
  1. (D) Reversible
  2. (B) New
  3. (B) Evaporate, leaving the salt
  4. (D) Water
  5. (C) Liquid particles can slide past each other
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