Any object which is changing its position with respect
to a reference point with time is said to be in motion.
[ ]
(iii) 1 km = 100 cm [ ]
Read the following statements and mark True (T) or False
(F) against each.
(i) The motion of a car moving on a straight road is an
example of linear motion. [ ]
If the earth is itself a magnet, can you guess the poles of earth’s
magnet by looking at the direction of the magnetic compass?
9. While a mechanic was repairing a
gadget using a screw driver, the steel
screws kept falling down. Suggest a way
to solve the problem of the mechanic on
the basis of what you have learnt in this
chapter.
A bar magnet has no markings to indicate its poles. How would
you find out near which end its North pole is located without
using another magnet?
You are given a magnet which does not have the poles
marked. How can you find its poles with the help of another
magnet which has its poles marked?
Reshma bought three identical metal bars from the market.
Out of these bars, two were magnets and one was just a
piece of iron. How will she identify which two amongst the
three could be magnets (without using any other material)?
State whether the following statements are True (T) or
False (F).
(i) A magnet can be broken into pieces to
obtain a single pole. [ ]
(ii) Similar poles of a magnet repel each other. [ ]
(iii) Iron filings mostly stick in the middle of a bar
magnet when it is brought near them. [ ]
(iv) A freely suspended bar magnet always
aligns with the north-south direction. [ ]
Fill in the blanks
(i) Unlike poles of two magnets each other,
whereas like poles each other.
(ii) The materials that are attracted towards a magnet are
called .
(iii) The needle of a magnetic compass rests along the
direction.
(iv) A magnet always has poles.
You are given a sample of a solution. How would you check
the possibility of it being an iodine solution?
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