Things are objects or materials around us that we can see, touch, and describe. They can be big or small, soft or hard, heavy or light. Each thing has properties like shape, color, and size.Volume is the amount of space that a thing or object occupies. We usually measure volume in liters (L), milliliters (mL), or cubic centimeters (cm³) depending on what we are measuring.For example:A glass of water has volume measured in milliliters (mL).A box may have its volume measured in cubic centimeters (cm³) using the formula: Volume = Length × Width × Height Example: A box that is 4 cm long, 3 cm wide, and 2 cm high has a volume of: 4 × 3 × 2 = 24 cm³So, things have volume because they take up space. Even air has volume, though we can’t see it.