Study Guide. Properties of materials

Properties of materials

Definitions:

Physical properties. These properties relate to how materials react to external stimuli.

Chemical properties. We can see these properties when the chemical
composition of a material changes because it
interacts with other substances.
Chemical properties are any of the properties of
matter that may only be observed and measured by performing a chemical change
or chemical reaction.

Ecological properties. Material properties concerning with the environment.

o Physical properties:

• Electrical properties:

Electrical conductivity. Some materials conduct electricity. (Metals)

Electrical insulation. Some materials don’t conduct electricity. (Wood)


• Thermal properties:

Thermal conductivity. Some materials conduct heat. (Metals)

Thermal insulation. Some materials don’t conduct heat. (Cork, wool,…)


• Optical properties:

Opaque. You can’t see through an opaque material.

Translucent. You can’t see through a translucent material but light can go through. (Some types of plastic)

Transparent. You can see through a transparent material. (Glass)


• Acoustic properties:

Acoustic conductivity. The capacity of materials to transmit sound. (Any metal)

Acoustic insulators. Some materials don’t conduct sound well. (Cork)


• Magnetic properties:

Magnetism. Some metals attract other metallic materials.

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