INDIAN SCHOOL MUSCAT
DEPARTMENT OF SCIENCE
SUBJECT: SCIENCE
Revision Worksheet No: 11
TOPIC : Separation of substances
Coordinating Staff: Rajkumar Joshi
Date of Issue: 08-11-2015
STD :
Name of the student: __________________________
Class; VI Sec: _____
Roll No: ____
Q.1 Why do we need to separate different components of a mixture? Give any
two reasons.
Q.2 State the method of separation you will use to remove impurities from a
sample of pulses or rice before cooking?
Q.3 Is it possible to separate wheat from sugar crystals? Give reasons for your
answers.
Q.4 How will you separate all the components of a mixture of sand and salt in
water?
Q.5 What is the difference between the principle of winnowing and that of
sieving?
Q.6 Name the components of the following mixtures:(i).
(ii).
(iii).
air
neembu pani
mist
P.T.O
Q.7 State any two factors that increase the solubility of a solute in a solution.
Q.8 Identify the method of separation of substances:(i).
(ii).
(iii).
(iv).
(v).
(vi).
to separate seeds or grains from stalks
to separate grains of corn from husk
to separate grass from coriander leaves
to separate broken rice from whole rice
to separate common salt from sea water
to separate sand from water
Q.9 You are given a mixture of rice, chick peas (channa) and salt in a bowl of
water. How will you separate all the components of this mixture?
Q.10 Amit has accidently spilled coconut oil in a bowl of water. Is it possible to
separate them? Explain giving reasons.
NOTE:- Please answer questions C and D from page no. 47 of
your science text-book.
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RVJ