How can we describe the difference between a sheet of loose leaf paper, and a

stack of it?

In this lesson you will learn to identify the difference between a square unit and a cubic unit

by analyzing dimensions.

Let’s ReviewA Common Mistake

Students sometimes forget about units.

Two?Two

birds?

Other times, they use incorrect units.Oh… two snakes!

Be sure to use correct values and correct units.

Let’s ReviewLet’s Review

When we multiply a value times itself, we are squaring that value.

When we multiply a value times itself, and then times itself again, we are

cubing that value.

Let’s ReviewCore Lesson

Square units always have side lengths of 1 unit. (Any unit!)

Cubic units always have edge lengths of 1 unit. (Any unit!)

Let’s ReviewCore Lesson

We use square units to measure area.

Let’s ReviewCore Lesson

1 ft.

1 ft.

“one square foot”foot2

foot • foot

How do we name different square units?

Let’s ReviewCore Lesson

1 plip

1 plip

“one square plip”

plip2

plip • plip

Let’s ReviewCore Lesson

How many square feet is that rug?

How many square inches is that piece of loose leaf?

How many square yards of fabric do we need for the new curtains?

We use square units when we compute:

Let’s ReviewCore Lesson

We use cubic units to measure the amount of space that a 3D solid occupies.

Let’s ReviewCore Lesson

1 cm.

1 cm.

“one cubic centimeter”centimeter3

centimeter • centimeter • centimeter

1 cm.

How do we name different cubic units?

Let’s ReviewCore Lesson

1 plip

1 plip

“one cubic plip”

plip3

plip • plip • plip

1 plip

Let’s ReviewCore Lesson

Which box contains more cereal?

How many blocks can we fit into that container?

Which bottle can hold more liquid?

We use cubic units when we compute:

In this lesson you have learned to identify the difference

between a square unit and a cubic unit by analyzing

dimensions.

Let’s ReviewGuided Practice

Write the name of each unit in two different ways.

yard

yard

milemile

mile

yard2

one square yardmile3

one cubic mile

Let’s ReviewExtension Activities

List three instances where you would want to measure something in SQUARE units. Now, list three instances where you would want to measure something in CUBIC units. Be prepared to explain your responses.

Let’s ReviewExtension Activities

Sort through the magazine and articles that your teacher has provided to find references to square units and cubic units. Explain whether the units are being used to measure volume or area.

Let’s ReviewQuick Quiz

Name this figure in two different ways.

Give one example of a situation where you would need to use square units, and one example of a situation where you would need to use cubic units.

inchinch

inch