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CBSE · Class 6 · Science

Methods of Separation in Everyday Life

Standard difficulty · 20 questions · 40 marks

Name: Date: Score: ____ / 40

Show your working for Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
Removing small stones from rice by hand is called:
  1. sieving
  2. filtration
  3. winnowing
  4. handpicking
2.
The best way to separate bran from wheat flour is:
  1. sieving
  2. sedimentation
  3. magnet
  4. decantation
3.
We separate bran from wheat flour by sieving because:
  1. the heavy particles sink by themselves
  2. they differ in size and colour and are few
  3. the particles are of different sizes
  4. beating loosens the grain from the stalks
4.
Sea water has about 35 g of salt in every litre. About how much salt is left when 2 L of sea water evaporates?
  1. 70 g
  2. 37 g
  3. 105 g
  4. 7 g
5.
A farmer winnows 330 g of grain mixed with husk and blows away 80 g of husk. How much grain is left?
  1. 250 g
  2. 260 g
  3. 410 g
  4. 80 g
6.
Curd is churned in 9 batches; each gives 250 g of butter. How much butter in all?
  1. 2,000 g
  2. 259 g
  3. 2,500 g
  4. 2,250 g
7.
Which mixture can be separated with a MAGNET?
  1. husk and grain
  2. chalk powder and water
  3. iron filings and sand
  4. sugar and water
8.
Which mixture can be separated by FILTRATION?
  1. sugar and water
  2. honey and water
  3. chalk powder and water
  4. vinegar and water
Section B — Short answer8 × 2 = 16 marks
9.
Why do we need to separate mixtures?
10.
Name the method to separate (a) iron filings from sawdust (b) butter from curd
11.
Sea water has about 35 g of salt per litre. How much salt can be got from 17 L?
12.
A sieve separated 400 g of fine flour from 180 g of bran. How much did the flour and bran weigh together?
13.
1000 mL of muddy water is left to settle. 80 mL of mud settles at the bottom, and the rest is decanted. How much water is decanted?
14.
How would you separate each, and what difference between the parts does it use? (a) iron filings from sawdust (b) chalk powder from water
15.
A shop has 9 sacks of 49 kg of rice each. Handpicking removes about 3 kg of stones from each sack. How much clean rice is left?
16.
Which of these can be separated from water by filtration: chalk powder or sugar? Why?
Section C — Word problems4 × 4 = 16 marks
17.
Describe how grain is separated from the harvested crop and cleaned, naming each method.
18.
A coastal family lets 35 L of sea water dry in a shallow pan. Sea water has about 35 g of salt per litre. (a) How much salt should be left? (b) If 13 g is lost while scraping, how much do they collect? (c) Name the method and explain it.
19.
Describe step by step how you would separate a mixture of chalk powder, sand, salt.
20.
A farmer threshes his crop and gets 66 kg of grain mixed with 5 kg of husk and 1 kg of stones. (a) How much clean grain is there? (b) Which methods remove the husk and the stones? (c) Why is winnowing done in a breeze?
AmbifulWorksheets
Practice that never repeats
CBSE · Class 6 · Science

Answer key

Methods of Separation in Everyday Life · AW-6S-SEP-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) handpicking—
2(a) sieving—
3(c) the particles are of different sizes—
4(a) 70 g35 × 2 = 70
5(a) 250 g330 − 80 = 250
6(d) 2,250 g9 × 250 = 2250
7(c) iron filings and sand—
8(c) chalk powder and water—
9To remove unwanted or harmful things, or to get a useful part.—
10(a) magnet (b) churning—
11595 g35 × 17 = 595
12580 g400 + 180 = 580
13920 mL1000 − 80 = 920
14(a) magnet (b) filtration—
15414 kg9 × (49 − 3) = 414
16chalk powder: it does not dissolve, so the filter catches it.—
17Threshing: the stalks are beaten to free the grain. Winnowing: the mixture is dropped from a height in the wind, so light husk blows away and heavy grain falls in a heap. Handpicking or sieving removes any stones and dirt.—
18(a) 1225 g (b) 1212 g (c) Evaporation: the Sun and wind dry the water, and the dissolved salt is left behind.35 × 35 = 1225; − 13
19Any correct sequence, for example: add water and stir to dissolve salt; filter out chalk powder and sand; evaporate the water to get back the dissolved solid.—
20(a) 60 kg (b) Winnowing removes the husk; handpicking or sieving removes the stones. (c) The wind blows the light husk away while the heavy grain falls straight down.66 − 5 − 1