(Definition of âallotâ from the Cambridge Business English Dictionary Â© Cambridge University Press)
In your own words, list the fve characterisTcs an Earth material must have in order to be considered a mineral. a Minerals Formed naturally b Inorganic c Solid substances such as ice d Minerals are crystalline substances. Atom are arranged in an orderly, repeTTve manner. e Minerals are chemical compounds 2.
To understand the formation of physical features of the earth and natural disasters, we must probe beyond the surface of the earth. The inner layers of the earth do have an effect on our daily lives, and it is important to know what is beneath the surface that we live on and how it works. The Composition of the Earth The earth contains three layers of different composition. The innermost is the core, the densest of the three layers. It is a spherical mass, composed largely of metallic iron, with smaller amounts of nickel and other elements. The middle layer is the mantle, made of dense, rocky matter. The outermost layer of the earth is the crust, which is the thinnet of the three layers. The core, mantle and crust are different sections of the earth because of the different composition they have.