• Finding mass in non-standard units• Comparison of mass.

What will we learn today?

MeasurementLength and Mass

The baby is heavy.

The child is heavier.

The father is the heaviest of the three.

Mass can be measured and compared using a fixed units.

We can also use the words

light lighter lightest

to describe mass.

1 ball stands for 1 unit.

The book is 3 units.

1 ball stands for 1 unit.

The cup is 2 units.

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

The object that goes down has a heavier mass.

The object that goes down has a heavier mass.

Dannie is heavier than May.May is lighter than Dannie.

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

Are you ready to try out the questions?