Chapter4: Sorting Materials into Groups
I. Multiple Choice Questions carrying one
mark each:
(1) Tick the material which is man ‐made:
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(a) fruits
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(b) cereals
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(c) glass
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(d) wood
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(2) Tick the material
which is hard:
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(a) cotton
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(b) sponge
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(c) metal
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(d) all of these
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(3) An example of soluble
substance is:
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(a) sand
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(b) wax
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(c) chalk
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(d) salt
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(4) A gas that comes out when you open an
aerated drink bottle is:
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(a) carbon dioxide (b) oxygen
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(c) nitrogen
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(d) hydrogen
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(5) An example of a
conductor is:
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(a) paper
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(b) wood
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(c) metal
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(d) rubber
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2.Write True (T) or False (F) carrying one mark each:
(a)Water is more volatile than ether.
(b)Carbon is a malleable substance.
(c)All solids are good conductors of heat.
(d)Liquids and gases are poor conductors of
heat.
(e)Early man covered his body with leaves and
skin of animals.
3.Fill in the
Blanks carrying one
mark each:
(a)…………… helps to understand similarities and
dissimilarities between objects.
(b)…………… is used to protect woolen clothes
from insects and has a characteristic odour.
(c)Metals have a shiny appearance, we can say
that they have a ……………………… look.
(d)………………. Is miscible in winter while
cooking oil is ……………………….. .
(e)We can see through air, it is ………………….
4.Answer in one
line only carrying two marks each:
(a)Define classification.
(b)What is a brittleness?
(c)What is a translucent object?
(d)Define conductivity.
(e)What is a
soluble substance?
(f)What is magnetic substance?
(g)How are transparent objects different from
opaque objects?
(h)Which of the following is not soluble in
water?
(i)Chalk (ii) common salt (iii) Sugar (iv)
Milk (v) Ink.
(i)Give two examples of objects which are made
of more than one material.
(j)Which of the
following materials is not suitable for making a bucket:
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(i) Plastic
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(ii) Steel
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(iii) Paper
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(iv) copper
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(k)Name two gases, two solids and two liquids
which are soluble in water.
(l)What are translucent objects? Give
examples.
6.Answer in two
or three lines only carrying three marks each:
(a)Why do metal objects lose their luster after
a while?
(b)Why are quilts made from unspun cotton?
(c)Why is glass called a brittle substance?
(d)Distinguish between miscible and
immiscible liquids.
(e)Write three advantages of grouping in
classifying materials?
(f)Classify the
following in different ways:
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(i) Your clothes
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(ii) Names in a phone book
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(iii) Utensils in your
kitchen.
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(g)Give two examples to explain the same things
can be made from different materials.
(h)Write seven ways in which materials can be
grouped or classified.
(i) Give one similarity between wood and oxygen.
(j)Why does wax float on water while sand
settles down
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