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.
Mountains are made mostly of…
- A.Water
- B.Cotton
- C.Rock
- D.Air
2.
Granite is a very ___ rock used to build floors.
- A.Hard
- B.Soft
- C.Wet
- D.Light
3.
Many small animals like worms and ants live in the…
- A.Sky
- B.Soil
- C.Sea only
- D.Fire
4.
A soft white rock used to write on a board is…
- A.Marble
- B.Granite
- C.Chalk
- D.Iron
5.
Wind, water and heat slowly ___ rocks.
- A.Paint
- B.Build up
- C.Wear down
- D.Cool only
6.
Rocks can be…
- A.Big boulders or tiny pebbles
- B.Only huge
- C.Only tiny
- D.Always soft
7.
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
8.
Soil is made when big rocks slowly break into…
- A.Bigger rocks
- B.Tiny pieces
- C.Water
- D.Air
9.
Soil is important because it helps…
- A.Plants grow
- B.Cars run
- C.Phones charge
- D.Lights glow
10.
Rotting leaves and dead plants in soil are called…
- A.Plastic
- B.Glass
- C.Metal
- D.Humus
11.
The hard solid rock deep below all the soil is called…
- A.Sand
- B.Topsoil
- C.Humus
- D.Bedrock
12.
The loose top layer where plants grow is called…
- A.Glass
- B.Soil
- C.Plastic
- D.Metal
13.
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
14.
Most plant roots grow in the…
- A.Clouds
- B.Solid bedrock
- C.Topsoil
- D.Air
15.
Why is marble chosen for the Taj Mahal but chalk would not work?
- A.Marble is cheap
- B.Chalk is heavier
- C.Marble is hard and lasting; chalk is soft and crumbly
- D.Chalk is shiny
Section B — Challenge / Olympiad (2 marks each)
5 × 2 = 10 marks
16.
Why is a thin layer of soil so precious?
- A.It took thousands of years to form
- B.It is shiny
- C.It is light
- D.It is man-made
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.
A field left bare with no plants loses soil fastest when there is heavy…
- A.Rain and wind
- B.Sunshine
- C.Moonlight
- D.Quiet
19.
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
20.
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
Answer Key
Section A — Multiple Choice (1 mark each)
- (C) Rock
- (A) Hard
- (B) Soil
- (C) Chalk
- (C) Wear down
- (A) Big boulders or tiny pebbles
- (B) To make the soil richer for crops
- (B) Tiny pieces
- (A) Plants grow
- (D) Humus
- (D) Bedrock
- (B) Soil
- (A) More rocky and less rich
- (C) Topsoil
- (C) Marble is hard and lasting; chalk is soft and crumbly
Section B — Challenge / Olympiad (2 marks each)
- (A) It took thousands of years to form
- (A) It forms in nature, not in a factory
- (A) Rain and wind
- (D) The richest soil for crops is lost
- (D) Scratch a softer surface
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