Changes in Solid Materials

The heavy rocks on the surface can be pressed and folded by the heat within the earth.

We can also change the size, shape, and texture of materials​ by bending, pressing, cutting, hammering or burning.

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​Changing Matter

Solid materials can be bent.

This is a kind of physical change since no new material is formed.

Hard materials like aluminum, brass, and steel can be bent by special tools.​

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Bending

Solid materials can also be pressed.

This process changes their size and shape.

It is still a physical change.

Elastic materials may return to their original shape after pressing.

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​Pressing

The size and shape of a material may also be changed by hammering.

A hammer is a tool with a heavy metal mounted at the end of a handle.

It is a physical change.​

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​Hammering

The size and shape of a solid material can also be changed by cutting.

Tools ​like scissors and cutters are necessary to cut materials.​

​Cutting