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 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
3.
Which rock is hard, shiny and used in fine buildings?
- A.Chalk
- B.Marble
- C.Mud
- D.Sand
4.
Rocks differ in their…
- A.Smell only
- B.Names only
- C.Sounds only
- D.Hardness, colour and weight
5.
Wind, water and heat slowly ___ rocks.
- A.Paint
- B.Build up
- C.Wear down
- D.Cool only
6.
Soil also holds ___ that plants drink.
- A.Metal
- B.Glass
- C.Water
- D.Smoke
7.
The dark, rich top layer of soil is called…
- A.Bedrock
- B.Topsoil
- C.The sky
- D.Sand sea
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.
Rocks can be…
- A.Big boulders or tiny pebbles
- B.Only huge
- C.Only tiny
- D.Always soft
10.
The hard solid material that makes up much of the ground is…
- A.Rock
- B.Cloth
- C.Paper
- D.Glass
11.
Most plant roots grow in the…
- A.Clouds
- B.Solid bedrock
- C.Topsoil
- D.Air
12.
Some rocks contain useful metals like iron and are called…
- A.Sweets
- B.Ores
- C.Soils
- D.Seeds
13.
Mountains are made mostly of…
- A.Water
- B.Cotton
- C.Rock
- D.Air
14.
Soil is important because it helps…
- A.Plants grow
- B.Cars run
- C.Phones charge
- D.Lights glow
15.
Many small animals like worms and ants live in the…
- A.Sky
- B.Soil
- C.Sea only
- D.Fire
Section B — Challenge / Olympiad (2 marks each)
5 × 2 = 10 marks
16.
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
17.
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
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.
A very small rounded rock you can hold is called a…
- A.Mountain
- B.Boulder
- C.Pebble
- D.Cliff
20.
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
Answer Key
Section A — Multiple Choice (1 mark each)
- (D) Humus
- (C) It is rich in humus and nutrients
- (B) Marble
- (D) Hardness, colour and weight
- (C) Wear down
- (C) Water
- (B) Topsoil
- (C) They break rock into smaller and smaller bits
- (A) Big boulders or tiny pebbles
- (A) Rock
- (C) Topsoil
- (B) Ores
- (C) Rock
- (A) Plants grow
- (B) Soil
Section B — Challenge / Olympiad (2 marks each)
- (D) Scratch a softer surface
- (B) Water
- (C) Erosion
- (C) Pebble
- (D) Soil
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