chap 2 (physical properties of materials)

What is electrical conductivity

Measure of how easily electricity flows through

What is thermal conductivity

Measure of how easily heat flows through

What is melting point

Temperature at which a solid changes into a liquid without a change in temperature

What is boiling point

The temperature at which a liquid changes into a gas without a change in temperature

What is strength

Ability to support a heavy load without changing it's shape permanently

What is hardness

Ability to scratch another material

What is flexibility

Ability to bend without breaking and return to it's initial shape and size after bending

What is density

Amount of matter an object has in proportion to it's volume

Replace ‘weak'

Use ‘less strong'

What is malleable

Ability to be repeatedly hammered into thin sheets

What is ductile

Ability to be bent without breaking

Replace lightweight

Low density

Replace fragile

Use brittle

What are the properties of ceramics, plastic, glass, fibres metals

How to find density

Mass divided by volume and to 3 sf.

What happens to the density when you increase the mass

The density increases

What happens to the density when you increase the volume

The density drecreases

When an object is placed in a fluid of lower density, the object…?

Sinks

When an object is placed in a fluid of higher density, the object…?

Floats