Measure the height of your friend and express it in (i) metres
(ii) centimetres and (iii) millimetres.
Take a tumbler or a bottle. Measure the length of the curved
part of the base of glass or bottle and record it.
Suppose the distance between your school and home is
1.5 km. Express it in metres.
Search for the different scales or measuring tapes at
your home and school. Find out the smallest value that
can be measured using each of these scales. Record your
observations in a tabular form.
Which of the following is not a standard unit of measuring
length?
(i) millimetre (ii) centimetre (iii) kilometre (iv) handspan
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?
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