Measurement of Mass – Basic 2 Basic Science Lesson Note (First Term)

Date: ___________
Class: Primary 3
Duration: 40 minutes

Basic science: measurement of mass

What is Mass?

Mass is how heavy something is. When we weigh things, we find their mass.

Tools for Measuring Mass

• Kitchen scale – for food items

• Bathroom scale – for people

• Balance scale – compares two things

Units of Mass

• Gram (g) – for light things like sugar
• Kilogram (kg) – for heavy things like a bag of rice
• 1 kilogram = 1000 grams

Exercise 1: Which is heavier?

• Apple or stone? _____
• Your bag or your shoe? _____
• 500g or 1kg? _____