1. Measurement
Length and Mass
What will we learn today?
• Finding mass in non-standard units
• Comparison of mass.

2. The baby is heavy.
The child is heavier.
The father is the heaviest of the three.

3. Mass can be measured and compared
using a fixed units.
We can also use the words
light
lighter
lightest
to describe mass.

4. 1 ball stands for 1 unit.
The book is 3 units.

5. 1 ball stands for 1 unit.
The cup is 2 units.

6. 1 ball stands for 1 unit.
The cup has a mass of 2 units.
The book has a mass of 3 units.
We can say that the book is heavier
than the cup by 1 units.
3 - 2 = 1

7. The object that goes down has a heavier
mass.

8. The object that goes down has a heavier mass.
Dannie is heavier than May.
May is lighter than Dannie.

9. Find the mass of the book.
The mass of the cup is 2 units.
The mass of the book will be 1 unit.
3 - 2 = 1

10. Are you ready to
try out the
questions?