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? 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
- make group of 4 students!
- Each group studies the units of sapan, palm width, and arm length below.
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- Measure 3 objects in the table 1 using the units prevously writen. Put the result in table 1.
- 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?
