The process that occurs when physical forces break rock into smaller pieces without changing the rocks chemical composition is called ?
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Ответ:
Answer : Mechanical weathering.
Explanation : The process that occurs when physical forces break the rock into smaller pieces without changing the rocks chemical composition is called as mechanical weathering.
This process usually occurs near the surface of the earth, where high temperature affects the land. The cool nights and hot days are often the reason for things to expand and contract. This movement can cause rocks to crack and break apart into tiny small pieces. There is no new substance obtained it is just a physical change which does not involves any chemical compositional changes in it.
Ответ:
Similarities between Mendeleev's periodic and Modern periodic table: Elements are arranged in groups and periods. Elements with similar properties are placed in the same group. Metals and non-metals are placed separately.
The major difference is that the elements in Mendeleev's periodic table were arranged by atomic mass and the modern periodic table arranges elements by atomic number. Of course as elements are constantly being discovered there were significantly fewer elements in Mendeleev's periodic table.