Vidaara.orgClass 6 · Mathematics
CodeVID-M6-WS
Methods of Separation in Everyday Life — 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.
Two or more substances mixed without forming a new substance make a:
- A.Mixture
- B.Metal
- C.Solution only
- D.Magnet
2.
The method of separation we use mainly depends on the ___ of the substances.
- A.Price
- B.Properties
- C.Names
- D.Colours only
3.
Removing a few visible stones from rice by hand is called:
- A.Winnowing
- B.Hand-picking
- C.Filtration
- D.Evaporation
4.
Separating lighter husk from heavier grain using wind is:
- A.Hand-picking
- B.Winnowing
- C.Decantation
- D.Filtration
5.
When muddy water is left still, the mud settles to the bottom. This is:
- A.Sedimentation
- B.Filtration
- C.Evaporation
- D.Winnowing
6.
The solid that settles at the bottom during sedimentation is called the:
- A.Filtrate
- B.Sediment
- C.Husk
- D.Residue gas
7.
Gently pouring off the clear liquid above the settled solid is:
- A.Decantation
- B.Filtration
- C.Evaporation
- D.Winnowing
8.
Passing a mixture through filter paper or a sieve is called:
- A.Sedimentation
- B.Filtration
- C.Winnowing
- D.Hand-picking
9.
In filtration, the clear liquid that passes through is the:
- A.Residue
- B.Filtrate
- C.Sediment
- D.Husk
10.
In filtration, the solid trapped on the filter is the:
- A.Filtrate
- B.Residue
- C.Solution
- D.Vapour
11.
When tea is poured through a strainer, the strainer acts as a:
- A.Magnet
- B.Filter
- C.Thermometer
- D.Mirror
12.
Salt dissolved in water cannot be separated by filtration because the salt:
- A.Settles at the bottom
- B.Passes through the filter with the water
- C.Floats on top
- D.Turns into a gas
13.
To separate dissolved salt from water we use:
- A.Filtration
- B.Evaporation
- C.Winnowing
- D.Decantation
14.
Common salt is obtained from sea water using the Sun's heat by:
- A.Solar evaporation
- B.Filtration
- C.Sedimentation
- D.Hand-picking
15.
To separate sand, salt and water, you should first ___ and then ___.
- A.evaporate, then filter
- B.filter to remove sand, then evaporate to get salt
- C.winnow, then hand-pick
- D.do nothing
Section B — Challenge / Olympiad (2 marks each)
6 × 2 = 12 marks
16.
A mixture of iron filings, sand and salt is to be fully separated. The BEST first step is to:
- A.Use a magnet to remove the iron filings
- B.Add more salt
- C.Heat everything at once
- D.Throw it away
17.
After the iron is removed, water is added to the sand-and-salt mixture. Filtering it gives:
- A.Sand as residue and salt water as filtrate
- B.Salt as residue and sand as filtrate
- C.Only iron
- D.Nothing
18.
Winnowing works because grain and husk differ mainly in their:
- A.Weight
- B.Colour
- C.Taste
- D.Smell
19.
Sedimentation followed by decantation is used to begin cleaning:
- A.Salt water
- B.Muddy water
- C.Cooking oil
- D.Dry rice
20.
Why is filtration alone NOT enough to make muddy river water safe to drink?
- A.It removes only larger dirt, not dissolved impurities or germs
- B.It adds salt
- C.It boils the water
- D.It removes the water
21.
A salt solution is evaporated to dryness. What is left in the dish?
- A.Pure water
- B.The salt
- C.Nothing
- D.Sand
Answer Key
Section A — Multiple Choice (1 mark each)
- (A) Mixture
- (B) Properties
- (B) Hand-picking
- (B) Winnowing
- (A) Sedimentation
- (B) Sediment
- (A) Decantation
- (B) Filtration
- (B) Filtrate
- (B) Residue
- (B) Filter
- (B) Passes through the filter with the water
- (B) Evaporation
- (A) Solar evaporation
- (B) filter to remove sand, then evaporate to get salt
Section B — Challenge / Olympiad (2 marks each)
- (A) Use a magnet to remove the iron filings
- (A) Sand as residue and salt water as filtrate
- (A) Weight
- (B) Muddy water
- (A) It removes only larger dirt, not dissolved impurities or germs
- (B) The salt
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