Vidaara.orgClass 6 · Mathematics
CodeVID-M6-WS
A Journey through States of Water — 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.
Water exists in how many states?
- A.One
- B.Two
- C.Three
- D.Four
2.
The change of water into vapour at its surface, without boiling, is:
- A.Condensation
- B.Evaporation
- C.Freezing
- D.Melting
3.
Evaporation becomes faster when the weather is:
- A.Cold and still
- B.Hot and windy
- C.Cloudy and damp
- D.Rainy
4.
The change of vapour back into liquid water on cooling is:
- A.Evaporation
- B.Condensation
- C.Boiling
- D.Transpiration
5.
Dew on grass in the early morning forms by:
- A.Evaporation
- B.Condensation
- C.Melting
- D.Freezing
6.
When salty sea water evaporates, the salt:
- A.Rises as vapour
- B.Is left behind
- C.Disappears forever
- D.Becomes rain
7.
The constant movement of water between sea, air and land is the:
- A.Rock cycle
- B.Water cycle
- C.Food chain
- D.Life cycle
8.
What drives the water cycle?
- A.The Moon
- B.The Sun's heat
- C.The wind only
- D.The soil
9.
The release of water vapour from the leaves of plants is called:
- A.Transpiration
- B.Respiration
- C.Condensation
- D.Precipitation
10.
Clouds are formed by the process of:
- A.Evaporation
- B.Condensation
- C.Collection
- D.Melting
11.
Rain, snow and hail are together called:
- A.Evaporation
- B.Condensation
- C.Precipitation
- D.Transpiration
12.
Using water carefully so it is not wasted is called water:
- A.Conservation
- B.Pollution
- C.Evaporation
- D.Harvesting only
13.
Collecting and storing rainwater is known as:
- A.Drip irrigation
- B.Rainwater harvesting
- C.Filtration
- D.Boiling
14.
Watering crops drop by drop at their roots is called:
- A.Flood irrigation
- B.Drip irrigation
- C.Rainwater harvesting
- D.Sprinkling everywhere
15.
We must not throw waste into rivers and lakes because it:
- A.Cleans the water
- B.Pollutes the water and harms living things
- C.Makes more rain
- D.Saves water
Section B — Challenge / Olympiad (2 marks each)
6 × 2 = 12 marks
16.
Two wet handkerchiefs are hung up; one is spread out and one is folded. The spread-out one dries faster because evaporation is faster with a:
- A.Larger exposed surface
- B.Smaller surface
- C.Colder cloth
- D.Heavier cloth
17.
A glass of cold water 'sweats' on the outside on a humid day. This shows the air contains:
- A.Water vapour
- B.Only oxygen
- C.Salt
- D.Ice
18.
The water you drink today might once have been ocean water. This is possible because the water cycle:
- A.Makes new water daily
- B.Uses the same water again and again
- C.Destroys water
- D.Only happens once
19.
In very cold places, precipitation often falls as:
- A.Snow
- B.Sand
- C.Steam
- D.Salt
20.
Cutting down too many trees can reduce local rainfall partly because trees add water vapour to the air through:
- A.Transpiration
- B.Reflection
- C.Filtration
- D.Magnetism
21.
A farmer switches from flooding the field to drip irrigation. The main benefit is that he:
- A.Uses much less water
- B.Uses more water
- C.Grows no crops
- D.Pollutes the river
Answer Key
Section A — Multiple Choice (1 mark each)
- (C) Three
- (B) Evaporation
- (B) Hot and windy
- (B) Condensation
- (B) Condensation
- (B) Is left behind
- (B) Water cycle
- (B) The Sun's heat
- (A) Transpiration
- (B) Condensation
- (C) Precipitation
- (A) Conservation
- (B) Rainwater harvesting
- (B) Drip irrigation
- (B) Pollutes the water and harms living things
Section B — Challenge / Olympiad (2 marks each)
- (A) Larger exposed surface
- (A) Water vapour
- (B) Uses the same water again and again
- (A) Snow
- (A) Transpiration
- (A) Uses much less water
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