Question

magnet is placed on a plastic plate with common pins spread on it, then
pins will stick all around the magnet. (b) pins will stick at the middle of the magnet
(c) pins will stick at the ends of the magnet. (d) none of these.
17. When a magnet is broken into pieces, the pieces
(a) have both north and south poles.
(b) have only north poles.
(c) have no poles.
(d) have only south poles.
18. Loss of water by plants is called
(a) transpiration
(b) condensation
(c) transportation (d) evaporation
19. Oxygen is used in hospitals for
(a) burning wastage
(b) artificial respiration
(c) fermentation
(d) decomposition
20. Composting method in which earthworms are used is known as
(a) composting
(b) manuring
(C) vermicomposting
(d) decomposing
SECTION -B (2 marks each)​

Answer 1

Hey your answer is :-

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16. Magnet is placed on a plastic plate with common pins spread on it, then

(a)pins will stick all around the magnet.

17. When a magnet is broken into pieces, the pieces

(a) have both north and south poles.

18. Loss of water by plants is called

(a) transpiration

19. Oxygen is used in hospitals for

(b) artificial respiration

20. Composting method in which earthworms are used is known as

(C) vermicomposting