Chapter 2: Measurements in Physics – Sample Activity

Context

You have been living in the city centre with your father.He recently bought a plot of land in your ancestral village to construct a residential house.

Support Material

Task

a) Design a good plan to help in the construction.

b) What do you think are benefits of a good plan in your society?

Chapter Summary

In this chapter, you have learnt :

• That measurement is a process of detecting an unknown physical quantity by using standard quantity.
• That measurements can never be exact; there is always some uncertainty.
• That the most common system of units in the world is the SI system.
• That when converting units, check dimensions to see that the conversion has been done properly.
• That the order-of-magnitude estimates can be very helpful.
• That the three fundamental physical quantities of mechanics are length, mass and time, which in the SI system have the unit’s metres (m), kilograms (kg) and seconds (s), respectively.
• That the prefixes indicating various powers of ten are used with these three basic units.
• That the density of a substance is defined as its mass per unit volume.
• The scientific method of study.