Answer: Group
Explanation:
A Group refers to the amalgamation of minerals from several closely related species. It is done for easier classification and is the third tier in Mineral classification with the first being the <em>Variety</em> of the Mineral, the second being the <em>Species</em> and the third being the <em>Group</em>.
An example of a group is Feldspar which is a group of tectosilicate minerals.
Lo siento, este en ingles
Explanation:
Hydrogen and helium are found in all stars. Ninety percent of all atoms in the universe are hydrogen atoms and fusion reactions fuel stars, resulting in the formation of helium and higher atomic number elements. This is the case because of the Big Bang, when temperatures were so high that only energy could exist.
Answer:
⭐Causes of environmental pollution
Urbanization and industrialization. Since the era of industrial revolution, man has continued to introduce hazardous materials into the environment at an alarming rate. ...
⭐Mining and exploration. ...
⭐Agricultural activities. ...
⭐Burning of fossil fuels. ...
⭐Particulate matter. ...
⭐Plastics.
migration rates,birth rates and death rates are all ways to measure changes in the population?
Answer:
B. Aryans
Explanation:
The Varnas system began during the Aryan invasion of India. The Varna system, which is known as the caste system, divides society into 4 categories:
- Brahmins are educators like scholars, teachers, gurus; and spiritual leaders such as priests.
- Kshatriyas are the "warriors" whose roles are to protect society. The term can be translated as "authority," so these people are usually kings, rulers and the like.
- Vaishyas are productive class, or simply the businessmen. They are in charge of agricultural businesses and trading. They ensure the wealth of the society.
- Shudras are coined as the unskilled workers. They are in a sense, the "servers". They tend to the higher classes and work for them and are expected to remain loyal to them.
