Changes in Solid Materials

Changes in Solid Materials

Open Ended

Look at the rock formation. Observe the layers of rock, and hot it looks like it was "folded". How do you think this happened?

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

Multiple Choice

Bending changes...

• the composition of a material

• the substance of a material

• the shape and size of a material

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

Open Ended

Describe what might happen if you press down on an egg. What about if you press down on a dishwashing sponge?

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

Multiple Choice

A heavy boulder is blocking the path to your house. Which tool will you use to remove it?

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