1. Measurement
Length and Mass
What will we learn today?
• Comparison of mass.

2. Before we start,
let’s learn some
useful terms.

3. comparison
long longer longest
short shorter shortest
tall taller tallest
high higher highest
heavy heavier heaviest
light lighter lightest

4. Let’s learn about mass.

5. The baby is heavy.

6. The baby is heavy.
The child is heavier.

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

8. Mass can be measured and
compared using a fixed units.

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

11. 1 ball stands for 1 unit.
The book is 3 units.

12. 1 ball stands for 1 unit.
The cup is 2 units.

13. 1 ball stands for 1 unit.
The cup has a mass of 2 units.
The book has a mass of 3 units.

14. 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.

15. Let’s learn another method.

16. The object that goes down is heavier.

17. The object that goes down is heavier.
Dannie is heavier than May.

18. The object that goes down is heavier.
Dannie is heavier than May.
May is lighter than Dannie.

20. Find the mass of the book.

21. Find the mass of the book.
You can use the mass of the
cup to help you!

22. Find the mass of the book.
The mass of the cup is 2 units.

23. Find the mass of the book.
The mass of the book will be
1 unit.

24. Are you ready to
try out the
questions?