work sheet

? DEFINITION OF MEASUREMENT

In the past, people use their own units of measurement without egreeing with other people. For example:

Span : the distance between the spread of little finger and thumb

Palm width : the width of all fingers of hand.

Arm length : the between elbow and tip of middle finger

All these units are easy to get but they often make disputes. Why? To answer this do the following activities!

A. What you need

Hand and ruler

B. Procedures

1. make group of 4 students!
2. Each group studies the units of sapan, palm width, and arm length below.

3. Measure 3 objects in the table 1 using the units prevously writen. Put the result in table 1.
4. Repeat procedure 3 using the ruler. Record the ruselt in table 2.

C. Data observation

Table 1

Objects measured	Measurement units	Result of measurement
Length of desk Length of book Width of door	Span Palm width span	………. ………. ……….

Table 2

Objects measured	Measurement units	Result of measurement
Length of desk Length of book Width of door	cm cm cm	………. ………. ……….

5. Compare results of your groups’s meuserement with other groups!

D. Question and conclusion

1. Look at table 1!

Will you find diffrences in the results of your groups’s meuserement with the results from other groups? Why does this happens?

2. Look at table 2!

Will you find diffrences in the results of your groups’s meuserement using a ruler when you compare them with the results from other groups? Why does this happens?

3. What is needed to have same measerement?

4. From your activitied. Make summary, What is measurement?