Chemical weathering is the disintegration of a substance in the rock through a chemical reaction.
Carbonation occurs when water and a pollutant, such as sulphur dioxide creates a weak sulphuric acid. When it rains and the water comes into contact with limestone a chemical reaction happens. Calcium sulphate is produced as it takes the calcium carbonate from the limestone. It can then transfer the solution to another area until it evaporates. When it does so it leaves behind calcium information such as stalactites.
hydration occurs when minerals in a rock absorb water, causing it to expand. Mineral, such as anhydrite, expands and weakens it’s structure and leave the rock more exposed to erosion.
oxidation occurs some substances react to being exposed to water or air. Iron, when exposed, will turn from a silver color to a red or dark brown color known as iron oxide. It weakens the rock.
hydrolysis occurs when water bonds with a mineral in the rock. It is particularly strong at weathering feldspars in rock and can lead to the formation of Kaolin.
Answer:
Definition of mayor-council. : of, relating to, or constituting a method of municipal government in which policy-making and administrative powers are vested in a usually elective mayor and council — compare council-manager plan, strong mayor, weak mayor.
Answer:
D) Manifest Destiny
Explanation:
Manifest Destiny -
In the 19th century , it was a belief that , the settlers were destined to expand in the North American region .
The three themes were as follows -
1. Duty to accomplish an irresistible destiny .
2. The special virtues of the people of America and American institutions .
3. To remake and redeem the west in an image of the agrarian American .
Hence , the correct answer is D) Manifest Destiny .
Answer:
6. answer
One of these was the astrolabe, a portable device used by sailors to help them find their way. By measuring the distance of the sun and stars above the horizon, the astrolabe helped determine latitude, an important tool in navigation
4. answer
The Spanish were among the first Europeans to explore the New World and the first to settle in what is now the United States. By 1650, however, England had established a dominant presence on the Atlantic coast. The first colony was founded at Jamestown, Virginia, in 1607
3. answer
The colony was founded mainly by sugar planters from Barbados, who brought relatively large numbers of African slaves from that island to develop new plantations in the Carolinas. To meet agricultural labor needs, colonists also practiced Indian slavery for some time
Explanation:
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