Clay can be hammered.

Hammer is used for nailing .

When you cut a board, its size and shape does not change .

Fire is needed to press and bent a material.

When materials are bent, pressed, hammered and cut the physical appearance change.

Paper clip can be hammered.

Wood can be cut using a saw.

The chemical content of materials changed after you hammered.

Materials that can be bent, pressed, cut and hammered change in size and shape.