Can a clinical thermometer be used to measure the temperature of boiling water ? Give reason for your answer.

Explain the term 'area of a surface'.

How are the units (i) square yard (ii) hectare (iii) km² (iv) cm² (v) mm² related to the S.I. unit of area?

(a) Describe in steps how would you measure the length of a pencil using a metre ruler. Draw a diagram if necessary.

(b) Explain with an example how you will use the metre ruler in part (a) if the ends of the ruler are broken.