5. Classify each UI WIIL
fallen leaf, wrist watch, bone, water, wooden shelf, fossil
, brick, glass, slee, 100 le plund
6. Classify the kind of growth (irreversible and internal or reversible and external) that takes place in
each of the following things:
body cells, hair, mountains, rivers, nails, clouds, glaciers, teeth
Few Word
Answers
Answer:
Figure
On what basis are the objects mentioned here classified?
(a) non-metals and metals
(b) non-magnetic and magnetic
(c) inflammable and non-flammable
(d) all the above
ANSWER:
(a) non-metals and metals.
Air, wood and impure water are non-metals, whereas copper, aluminium and silver are metals.
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Question 2:
In which of these groups are all the items transparent?
(a) water, mirror, spectacles
(b) water, air, spectacles
(c) mirror, air, steel plate
(d) wood, steel plate, brick
ANSWER:
(b) water, air, spectacles
Water, air and spectacles are transparent as they allow light to pass through them completely.
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Question 3:
Which of the following is elastic, opaque and inedible?
(a) gold chain
(b) rubber
(c) chapatti dough
(d) chewing gum
ANSWER:
(b) rubber
Rubber is elastic, opaque and is not fit for eating.
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Question 4:
Float and sink; transparent and opaque; lustrous and dull; conductor and insulator; hard and soft:
(a) all are properties of solids.
(b) all are pairs of opposites.
(c) both a and b
(d) none of the above
ANSWER:
(b) all are pairs of opposites
All of the mentioned items are pairs of opposite traits.
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Question 5:
Rita wrote down some properties of copper, aluminium and iron. Which of them are correct.
(a) All are metals.
(b) All are good conductors of heat and electricity.
(c) All are ductile.
(d) All of the above are correct.
ANSWER:
(d) All of the above are correct
Copper, aluminium and iron are metals. All metals are ductile and are good conductors of heat and electricity.
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Question 6:
Study the flow chart given below and identify the objects A, B, C and D.
(a) A-petrol; B-water; C-wax; D-silver
(b) A-petrol; B-water; C-stone; D-iron
(c) A-water; B-petrol; C-wax; D-silver
(d) A-petrol; B-shampoo; C-silver; D-wood
Figure
ANSWER:
(b) A-petrol; B-water; C-stone; D-iron
Petrol is flammable, water is a liquid, stone is hard and iron is a metal.
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Question 7:
I
Explanation: