Vidaara.orgClass 3 · Mathematics
CodeVID-M3-WS
Rocks & Soil — Practice Worksheet
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.
Rotting leaves and dead plants in soil are called…
- A.Plastic
- B.Glass
- C.Metal
- D.Humus
2.
Why is soil important on top of the hard rock?
- A.It is shiny
- B.Plants can grow in soft soil
- C.It is heavy
- D.It blocks the Sun
3.
Why does cracking, freezing and heating help make soil?
- A.They grow the rock
- B.They paint the rock
- C.They break rock into smaller and smaller bits
- D.They cool the Sun
4.
Humus makes soil…
- A.Hard like rock
- B.Rich and good for plants
- C.Useless
- D.Dry forever
5.
Many small animals like worms and ants live in the…
- A.Sky
- B.Soil
- C.Sea only
- D.Fire
6.
Some rocks contain useful metals like iron and are called…
- A.Sweets
- B.Ores
- C.Soils
- D.Seeds
7.
Granite is a very ___ rock used to build floors.
- A.Hard
- B.Soft
- C.Wet
- D.Light
8.
Mountains are made mostly of…
- A.Water
- B.Cotton
- C.Rock
- D.Air
9.
As we dig deeper, the soil usually becomes…
- A.More rocky and less rich
- B.Softer and richer
- C.Wetter forever
- D.Lighter in colour only
10.
We can protect soil by planting…
- A.Metal sheets
- B.Plastic
- C.Glass
- D.Trees and grass
11.
Throwing plastic into soil is bad because plastic…
- A.Does not rot and harms the soil
- B.Feeds plants
- C.Makes humus
- D.Helps worms
12.
Which rock is hard, shiny and used in fine buildings?
- A.Chalk
- B.Marble
- C.Mud
- D.Sand
13.
Most plant roots grow in the…
- A.Clouds
- B.Solid bedrock
- C.Topsoil
- D.Air
14.
The loose top layer where plants grow is called…
- A.Glass
- B.Soil
- C.Plastic
- D.Metal
15.
The dark, rich top layer of soil is called…
- A.Bedrock
- B.Topsoil
- C.The sky
- D.Sand sea
Section B — Challenge / Olympiad (2 marks each)
5 × 2 = 10 marks
16.
Sandy soil lets water drain away quickly, while clay soil holds water. This shows soils differ in how they hold…
- A.Light
- B.Water
- C.Sound
- D.Colour
17.
A field left bare with no plants loses soil fastest when there is heavy…
- A.Rain and wind
- B.Sunshine
- C.Moonlight
- D.Quiet
18.
We test if a rock is hard by seeing if it can…
- A.Make sound
- B.Float
- C.Melt in the hand
- D.Scratch a softer surface
19.
Lichens and moss slowly grow on bare rock and help break it into soil. This shows living things can help make…
- A.Plastic
- B.Glass
- C.Metal
- D.Soil
20.
Sand at the beach is really millions of tiny…
- A.Seeds
- B.Drops of water
- C.Pieces of glass made by people
- D.Bits of broken rock
Answer Key
Section A — Multiple Choice (1 mark each)
- (D) Humus
- (B) Plants can grow in soft soil
- (C) They break rock into smaller and smaller bits
- (B) Rich and good for plants
- (B) Soil
- (B) Ores
- (A) Hard
- (C) Rock
- (A) More rocky and less rich
- (D) Trees and grass
- (A) Does not rot and harms the soil
- (B) Marble
- (C) Topsoil
- (B) Soil
- (B) Topsoil
Section B — Challenge / Olympiad (2 marks each)
- (B) Water
- (A) Rain and wind
- (D) Scratch a softer surface
- (D) Soil
- (D) Bits of broken rock
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