Monday
Monday: What is volume?
Hazel the Hedgehog tucks her pencil behind her ear and opens a small wooden box.
"I want to fill this box with my little building cubes," she says softly.
"But how many cubes will fit inside?"
Bennie the Bear sets one cube on the table. "Each side of this cube is 1 centimeter long."
"It is a unit cube. It fills 1 cubic centimeter of space."
Hazel places cubes in neat rows, with no gaps and no overlaps.
"Counting the cubes tells us the volume," says Bennie. "Volume is the space inside."
Learn it: count unit cubes
Volume is the amount of space inside a solid shape.
A unit cube has sides 1 unit long. It has a volume of 1 cubic unit.
Fill a shape with unit cubes, with no gaps and no overlaps.
The number of cubes is the volume, in cubic units.
This box has 3 × 2 = 6 cubes in its bottom layer.
It has 2 layers, so it holds 6 + 6 = 12 cubes.
Its volume is 12 cubic units.
- Read the question.
- Tap your answer.
How many unit cubes make this box?
How many unit cubes make this box?
How many unit cubes make this box?
How many unit cubes make this box?- Read the question.
- Tap your answer.
Which unit fits the volume of a big moving box best?- Find how many cubes each box holds.
- Put them from least to greatest volume.
| Sentence | True or false? |
|---|---|
| Volume is measured in cubic units. | ? |
| A unit cube has a volume of 1 cubic unit. | ? |
| Area and volume use the same units. | ? |
| A box with 2 layers of 6 cubes has a volume of 12 cubic units. | ? |
Fill the box with cubes in neat rows, with no gaps.
Count the cubes. That count is the volume of the box in cubes.
Great counting! Tomorrow Hazel finds a faster way with layers.