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.
We can protect soil by planting…
- A.Metal sheets
- B.Plastic
- C.Glass
- D.Trees and grass
2.
The dark, rich top layer of soil is called…
- A.Bedrock
- B.Topsoil
- C.The sky
- D.Sand sea
3.
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
4.
Why is topsoil the best layer for farming?
- A.It has no water
- B.It is the hardest
- C.It is rich in humus and nutrients
- D.It is the deepest
5.
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
6.
The hard solid material that makes up much of the ground is…
- A.Rock
- B.Cloth
- C.Paper
- D.Glass
7.
A soft white rock used to write on a board is…
- A.Marble
- B.Granite
- C.Chalk
- D.Iron
8.
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
9.
Most plant roots grow in the…
- A.Clouds
- B.Solid bedrock
- C.Topsoil
- D.Air
10.
Which rock is hard, shiny and used in fine buildings?
- A.Chalk
- B.Marble
- C.Mud
- D.Sand
11.
Wind, water and heat slowly ___ rocks.
- A.Paint
- B.Build up
- C.Wear down
- D.Cool only
12.
The breaking down of rock into soil takes…
- A.A very long time
- B.One minute
- C.One hour
- D.No time
13.
Granite is a very ___ rock used to build floors.
- A.Hard
- B.Soft
- C.Wet
- D.Light
14.
Mountains are made mostly of…
- A.Water
- B.Cotton
- C.Rock
- D.Air
15.
Why do farmers add manure to their fields?
- A.To dry the soil
- B.To make the soil richer for crops
- C.To turn it to rock
- D.To remove worms
Section B — Challenge / Olympiad (2 marks each)
5 × 2 = 10 marks
16.
Coal is a rock that is special because it can…
- A.Burn to give heat
- B.Float on water
- C.Glow at night
- D.Grow bigger
17.
Why do we say rock is a natural material?
- A.It forms in nature, not in a factory
- B.It is grey
- C.It is heavy
- D.People build it
18.
Tree roots help stop the soil from being washed or blown away. This is called preventing soil…
- A.Painting
- B.Cooking
- C.Erosion
- D.Lighting
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.
If heavy rain washes away the topsoil, farmers worry because…
- A.Plants grow faster
- B.The sky changes
- C.Bedrock grows
- D.The richest soil for crops is lost
Answer Key
Section A — Multiple Choice (1 mark each)
- (D) Trees and grass
- (B) Topsoil
- (A) Does not rot and harms the soil
- (C) It is rich in humus and nutrients
- (B) Plants can grow in soft soil
- (A) Rock
- (C) Chalk
- (C) They break rock into smaller and smaller bits
- (C) Topsoil
- (B) Marble
- (C) Wear down
- (A) A very long time
- (A) Hard
- (C) Rock
- (B) To make the soil richer for crops
Section B — Challenge / Olympiad (2 marks each)
- (A) Burn to give heat
- (A) It forms in nature, not in a factory
- (C) Erosion
- (D) Soil
- (D) The richest soil for crops is lost
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