Table of contents:

Materials

Every material in our world can be divided into two groups:

• pure substance
• mixture

The pure substance can differ in its boiling point and other characteristics.

So, if we try to find the characteristics of certain material we can know if it is pure substance or not and if so the property of it.

Example:

Mixed:

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Air, sea water, crude oil, milk, rocks

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pure substance:

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Gold, silver, water, dry ice(freezed CO2), Ethernole, and Salt.

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Ok, so inside that division of pure substance there is two divisions:

• Element