Скачать или смотреть Prep.2 | Formation of Minerals and Soil | Unit 4 - Lesson 2 | Science

شرح ساينس الصف الثاني الاعدادي لغات - الفصل الدراسي الاول
شرح ساينس تانية اعدادي - ترم اول

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in this lesson:
Weathering

Mineral
It is a naturally occurring solid inorganic substance that has a crystalline structure and a specific chemical composition
The specific chemical composition of minerals gives them a definite (specific)
crystalline structure that can be identified by using modern equipments. However,
there are certain physical properties that can be used to distinguish between
minerals, including :

The colour
Luster (shining)
Transparency

Minerals are formed in nature from several sources, including:
Magma solidification
'27 Crystallization of solutions from hydrothermal vents

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