Concept of Volume. Units of Volume Measurement
Understanding how to measure the space inside three-dimensional objects
What is Volume?
Volume is the amount of space occupied by a three-dimensional (3D) object. It measures "how much fits inside" an object.
Think About It!
Imagine filling a box with small cubes. The number of cubes that fit inside tells you the volume!
Comparing Dimensions:
| Measurement | Dimensions | What It Measures | Example |
|---|---|---|---|
| Length | 1D (one) | Distance | A line segment |
| Area | 2D (two) | Surface | A rectangle |
| Volume | 3D (three) | Space inside | A box |
Interactive 3D Visualization: 1D vs 2D vs 3D
Interactive visualization — available in the full lesson
Volume vs Capacity
Volume
The amount of space an object occupies
Example: A solid wooden block has volume
Measured in: cubic units (cm³, m³)
Capacity
How much a container can hold
Example: A glass has capacity for water
Measured in: liters (L, mL)
Important Connection
Volume and capacity are closely related! 1 liter = 1 cubic decimeter (1 L = 1 dm³)