Answer:
The great varieties of minerals on the Earth are classified by mineralogists into a small number of groups on the basis of : The negative ion or ionic group in their chemical composition.
Explanation:
Minerals are classified based on their chemical properties. The anion, a negatively charged ion that generally comes at the end of a mineral's chemical formula, is the fundamental foundation for classifying minerals, with the exception of the native element class. Cations are ions with a net positive charge because they have fewer electrons than protons. Anions, on the other hand, have a net negative charge because they contain more electrons than protons.
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The Tian Shan mountain range is located in the north and the west of Taklamakan Desert, which is located in Central Asia.
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Answer:
Option (1)
Explanation:
The Umbra refers to the dark portion of the shadow zone where there reaches no light from the source (Sun) because of its opaque property. These shadows are formed during the time of occurrence of an eclipse.
During the time of an annular eclipse, the moon is at the farthest distance from the earth, due to which the moon appears to be much smaller in size and cannot fully cover the Sun. So, this condition gives rise to the formation of a ring-like structure, and light is transferred from the sun through the periphery of the moon. There occurs both the annular solar eclipse and annular lunar eclipse.
Thus, the correct answer is option (1).
