Materials and Properties Flashcards
The different features of a material are called its…
Properties
Name 5 properties of materials
Melting point Strength Stiffness Hardness Density
What is meant by melting point?
The temperature that a solid turns into a liquid.
What is the melting point of water?
0 Degrees Celsius
What is meant by the strength of a material?
How good a material is at resisting a force.
How can we test the strength of a material?
See how much force is needed to break it or change its shape.
Name the two types of material strength.
Tensile strength
Compressive strength
What is tensile strength?
How much a material can resist a pulling force.
Name an object that needs a high tensile strength
rope
cables
What is compressive strength?
How much an object can resist a pushing force.
Name an object that needs a high compressive force
Bricks - or they would be squashed under the weight of the bricks above them.
Name an object that needs high tensile and compressive strength
Roof cross beams
What is meant by a stiff material?
A material that does not bend when a force is applied to it.
Name a material that is stiff
Steel
Name a strong substance that is not stiff
Rubber - it does not break but can bend
What is meant by the hardness of a material?
How difficult a material is to cut into.
What is the hardest material found in nature?
Diamond
What is the only thing that can cut a diamond?
Another diamond
What are diamonds used to cut?
Diamond tipped industrial drills
What is mass
The amount of particles that an object is made from.
What is volume?
The amount of space the particles in an object take up
What is density?
The mass of an object per 1cm3
Describe the density of a solid
high density
Describe the density of a gas
low density
An object that is less dense than water will…
float on the water
An object that is more dense than water will..
sink in the water.
