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Classification of Materials - Coggle Diagram
Classification of Materials
Materials are things that are used to make other useful objects
The sources of materials can be divided into two groups
Natural
Animals
Wool
Fur/Hair
Sheep
Goats
Leather
Skin
Snakes
Cows
Silk
Silkworm
Feathers
Birds
Plants
Rubber
Sap of rubber trees
Cotton
Frim fruits of cotton
Wood
Trunk and branches plants
From ground
Metals
NIckel
Copper
Iron
Rocks
Clay
Sand
Stone
https://youtu.be/EtvdquC90vc
Man-made
https://youtu.be/ZZjR2BzYKh0
Plastics
Styrofoam
Plastic bag
Nylon
Common properties of materials
Every material has its own properties
Like common properties of materials from animals, plant, the ground and man-made are all different
Sometimes the property of material can be changed to meet our needs such that it can be used to make into a particular useful objects
We can also change a material to have different characteristics of property for different purposes.
Examples
Density
Floats
Low densisty
Sink
High density
Brittleness
Non-brittle
Does not break easily when hits or drops
Brittle
Breaks easily when hits or drops
Waterproof
Waterproof
Does not allow water to pass thorugh
Non-waterproof
Allows water to pass thorugh
Transparency
Transparent
Allows all light to pass through
Allow us to see through
Opaque
Does not allow light to pass thorugh
Allows us to see nothing
Translucent
Allows some light to pass through
Allows us to see a little
Flexibility
Flexible
Can be bent easily
Stiff
Cannot be bent easily
Absorbency
Cannot absorb
Low absorbency of water
Able to absorb
High absorbency of water
Strength
Strong
Support heavy things without breaking
Weak
Cannot support heavy things well that causes it to break
Hardness
Hard
Can be scratched easily
Can be compressed easily
Soft
Can be compressed easily
Can be scratched easily
Choosing materials in making useful objects
Materials are used to make useful objects so that we can use them in our daily lives
To choose the suitable materials, we need to consider
Fabric is produced from cotton. Fabrics are used for making things such as clothes.
It is important to choose the suitable material to make objects. When objects are not made from suitable materials, they can be dangerous