Answer:
minerals of volcanic origin with large crystals is formed by magma that cooled off deeper into the crust.
Explanation:
the rocks of volcanic origin are divided into two main categories by the place of formation. extrusive igneous rocks and intrusive igneous rocks .extrusive igneous rocks are the one that are formed on the surface .the intrusive igneous rocks are formed deeper into the crust
It is because black absorbs heat whereas white reflects heat
They are now called genes.
Answer:
Covalent bonds
Explanation:
Covalent bonds
These types of chemical bonds are between the atoms of same or comparable electronegtivity .
The formation of bond is to attain stability of the compound formed .
Hence , octet rule plays a major rule .
For example ,
The bond between the atoms of H₂ is a covalent bond , since , one atom of H have only 1 electron in its valence shell .
So it shares its one electron with another Hydrogen atom to attain stability , and forms a covalent bond .
During the mid 19th century, the country's natural resources were heavily exploited without any regard for the resulting waste that would be produce in the process. Forest land were being converted to industrial and residential areas. Mines were popping up to where rich minerals were present.