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Materials - Coggle Diagram
Materials
Every material has its own properties
Hardness
Hard
cannot be scratched easily
Soft
can be compressed easily
Strength
Strong
can support heavy things without breaking
Weak
cannot support heavy things well that causes it to break
Flexibility
Flexible
can be bent easily without breaking
Not flexible
cannot be bent
Density
low density
Floats on water
high density
sinks in water
Brittleness
brittle
Breaks easily when drops
non- brittle
Does not break easily when drops
Transparency
Transparent
Allows light to pass through
Opaque
Does not allow light to pass through
Waterproof
Waterproof
Does not allow water to pass through
non-waterproof
Allows water to pass through
Ability to absorb water
Able to absorb water
High absorbency of water
Cannot absorb water
Low absorbency of water
Choosing materials in making useful objects
Object
Tyre
Usage
To let vehicles move on the roads smoothly
Material
Rubber
Properties required
Hard
Flexible
Waterproof
Strong
Rope
Usage
Allows us to climb up the wall
Material
Nylon
Properties required
Flexible
Light
Durable
Strong
Jacket
Usage
To keep us warm in cold weather
Material
Leather
Properties required
Light
Strong
Soft
Windscreen of a car
Material
Glass
Properties required
Waterproof
Hard
Strong
Not flexible
Transparent
Usage
Let the drivers see the traffic
Fabric
It is produced from cotton, nylon, wool or silk
Fabric are used for making things
Clothes
Curtains
Sheets
Importance of selecting the right materials
When objects are not made from a suitable material
They can be dangerous or can cause injuries to people who use them
The sources of materials
Man-made
Nylon
Plastics
Natural
Animals
Wool
Leather
Silk
https://youtu.be/xJD1grsX0Dw
Feathers
Plants
Wood
Rubber
Cotton
From the ground
Glass
Metal
Rocks