Answer:
The correct answer is B. They are a collection of minerals or a body of glass.
Explanation:
The study of rocks needs the observation of their characteristics; its characteristics depend on the properties of the minerals that compose it, its relative amounts and the way in which these were joined to originate the rock. Texture is the external appearance of any rock. It depends on the shape, size and internal arrangement of mineral crystals. Each of these characteristics maintains its specific properties (chemical and physical) in the rock as a whole.
In a rock we can distinguish two types of minerals:
Essential minerals. They are the ones that constitute the nature of the rock and give it its characteristics and properties for being in greater proportion. The lack of one of them would result in the formation of a different rock with different properties.
Accessory minerals These are minerals that appear occasionally in very low proportions within the typical composition of a particular rock. Its presence does not alter the basic characteristics of the rock.
Answer:
Labor Day pays tribute to the contributions and achievements of American workers
Explanation:
Labor Day pays tribute to the contributions and achievements of American workers and is traditionally observed on the first Monday in September. It was created by the labor movement in the late 19th century and became a federal holiday in 1894.
<span>the man is under a fixed interval schedule of reinforcement, while the woman is under a fixed ratio schedule of reinforcement.
Fixed interval reinforcement is a type of reinforcement that gives reward only after a specific period of time has passed. A fixed ratio reinforcement is a type of reinforcement that is based on production rate</span>
A representative assembly that managed Virginia
Africa was a place which gave birth to famous civilization called the Nile civilization. The color, the hair of the Africans reveal the adaptations of how a natural African fit himself to his country.
Explanation:
Christianity prevailed in Ethiopia before the Church of England. Islam existed in Africa even before it reached Saudi Arabia. Ethiopia is one of the oldest nation in Africa to actively repel and isolate against the colonialism. Africa has always been a part of christian, Islamic and Jewish world.
Africa practiced a very organised worshiping traditions which are long lost now. Most of the native Africans are common with Abraham faith. Africa was also rich in natural resources which were divided by the European nations. Internal conflicts in Africa made them weak and urged the Africans to accept the thug life.
