Which is the smoothest?
metal trombone burlap sack asphalt road
Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials.
A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells. Some examples of properties are shiny, hard, fragile, and stretchy.
For example, a shiny material reflects a lot of light. A fragile material breaks when you drop it.
Smooth is a property. A smooth material is not rough or bumpy.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the metal trombone is the smoothest. If you touch a metal trombone, it will not feel rough.