Use measuring instruments with higher accuracies and compare the measurements in terms of accuracy, consistency and sensitivity

Define length

Distance between two points

units used to measure length

Millimetres (mm), centimetres (cm) or kilometres (km)

The usage of vernier caliper

It can measure the thickness of outer diameter, inner diameter and depth of an object

Why is Vernier caliper more accurate compared to a ruler

Vernier caliper has a finer scale than a ruler, and it can measure up to 0.02 mm.

systematic error

It is an error caused by using measuring instruments that are not accurate

How can we determine zero error in Vernier calipers

Zero error can be determined when the jaws of the vernier calipers are closed

Define mass

Mass is the quantity of matter in an object

How can we measure mass accurately and precisely

Mass can be measured using digital electronic balance

How can we measure time accurately

Time can be measured using a stopwatch accurately to 0.01 second

measure electric current in a circuit

Ammeter is used to measure electric current in a circuit