Page 66 - Science and Technology Std 3

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DO NOT DUPLICATE

Look at the following picture and then read the description
that follows.
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Figure 2 Measuring length using a handspans

Figure 2 shows a boy measuring the length of the table using
handspans. Besides him is a girl waiting to measure the length
of the table using handspans.

Activity 2 Measuring length

Procedure

(i) Count five handspans on the table and mark the endpoint.

(ii) Ask your friend to count five handspans by tracing where
you took the measurements.

Have the two measurements ended on the same marked
point? Give reasons for your results after the measurements.

Handspans have been used to measure the length of the table.
The lengths of hands of different people are not the same.

This type of measurement is non-standard. It does not give
the same results. Other non-standard measurements of length
include the foot, fingers, footsteps and length of arms.

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PROPERTY OF UNITED REPUBLIC OF TANZANIA GOVERNMENT
Ministry of Education, Science and Technology
Science and Technology 3.indd 59 03/08/2019 11:02