Tenacity
TENACITY
Tenacity: It’s the capacity of absorbing energy when a material it’s hit or deformed.
An example of a sostenible material its glass
( video)
Hardness
HARDNESS: Property of material by which they are difficult to compress or scratch is called hardness. For example, iron and copper are hard materials. Bamboo its an example of a hard and sostenible material What's Hardness? (video) Mohs scale:
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