Answer:
Chemical composition
Explanation:
Minerals are usually classified according to their chemical composition. The chemical composition of a mineral is usually identified through the use of a mass spectrometer. However, to some extent, minerals are also classified according to their physical properties, such as color, shape and sharpness. This is a method that is much more simple and requires less money and time.
Answer:
Rivers were crucial to the survival of early civilizations because they were responsible for providing a source of water, irrigation for good farmland and a way for people to trade with other people through water transportation. Many of the earliest civilizations thrived due to the availability of rivers such as Mesopotamian cultures with the Euphrates River and Tigris River, Egyptians with the Nil
Explanation:
Answer:
Please give more information!!
Explanation: