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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.
Water drops on a cold glass of juice form by…
  • A.Condensation
  • B.Evaporation
  • C.Freezing
  • D.Burning
2.
Steam from boiling water turns to drops on a cool lid. This is…
  • A.Evaporation
  • B.Condensation
  • C.Melting
  • D.Freezing
3.
Which dissolves in water?
  • A.Sand
  • B.Salt
  • C.Oil
  • D.A coin
4.
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
5.
The three states of matter are solid, liquid and…
  • A.Gas
  • B.Light
  • C.Sound
  • D.Heat
6.
Wet clothes dry because the water in them…
  • A.Melts
  • B.Freezes
  • C.Evaporates
  • D.Mixes
7.
Tiny particles are packed most tightly in a…
  • A.Solid
  • B.Liquid
  • C.Gas
  • D.Flame
8.
A change that can be undone to get back the first thing is…
  • A.Permanent
  • B.Irreversible
  • C.Reversible
  • D.Burning
9.
Melting and freezing are opposite changes; both change the ___ of matter.
  • A.Colour
  • B.State
  • C.Name
  • D.Weight
10.
Sugar stirred into water seems to vanish. We say it has…
  • A.Burned
  • B.Frozen
  • C.Melted by cold
  • D.Dissolved
11.
A solid has a fixed shape and a fixed…
  • A.Colour only
  • B.Size (volume)
  • C.Smell
  • D.Sound
12.
Ice melting into water is caused by…
  • A.Quiet
  • B.Cold
  • C.Darkness
  • D.Heat
13.
Cooking an egg is ___ because you cannot get the raw egg back.
  • A.Melting
  • B.Reversible
  • C.Irreversible
  • D.Mixing only
14.
Which of these is a reversible change?
  • A.Rusting iron
  • B.Burning wood
  • C.Cooking rice
  • D.Melting chocolate
15.
When a liquid is cooled and turns into a solid, it is called…
  • A.Boiling
  • B.Melting
  • C.Freezing
  • D.Dissolving
Section B — Challenge / Olympiad (2 marks each) 5 × 2 = 10 marks
16.
Different solids melt at different temperatures; butter melts easily but iron needs very great…
  • A.Light
  • B.Cold
  • C.Heat
  • D.Sound
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.
Evaporation and condensation together keep happening in nature as part of the…
  • A.Light cycle
  • B.Food chain
  • C.Water cycle
  • D.Day cycle
20.
A balloon can be squeezed smaller because the gas inside has particles that are…
  • A.Solid
  • B.Tightly packed
  • C.Frozen
  • D.Far apart and can be pushed closer

Answer Key

Section A — Multiple Choice (1 mark each)
  1. (A) Condensation
  2. (B) Condensation
  3. (B) Salt
  4. (A) Sweet
  5. (A) Gas
  6. (C) Evaporates
  7. (A) Solid
  8. (C) Reversible
  9. (B) State
  10. (D) Dissolved
  11. (B) Size (volume)
  12. (D) Heat
  13. (C) Irreversible
  14. (D) Melting chocolate
  15. (C) Freezing
Section B — Challenge / Olympiad (2 marks each)
  1. (C) Heat
  2. (B) New
  3. (B) Evaporate, leaving the salt
  4. (C) Water cycle
  5. (D) Far apart and can be pushed closer
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