Answer:
With its population of traders, merchants and scholars, Timbuktu was known throughout western Africa and its fame extended to Europe and Asia. Timbuktu is best known for its famous Djinguereber Mosque and prestigious Sankore University, both of which were established in the early 1300s under the reign of the Mali Empire, most famous ruler, Mansa Musa.
Explanation:
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.
<span>Dr. Tepper-Harmon is of the belief that life-span development can't be studied without considering several factors such as biological, cognitive, and socio-emotional dimensions. He holds this belief because he has determined that development is multidimensional, and that no conclusion can be drawn from looking at only one aspect of development.</span>
