Continental drift is the geological phenomenon in which continents move. These movements at speeds of a few centimeters per year can actually be measured since the advent of satellite geodesy. The movement of continents is caused by plate tectonics.
Alfred Wegener noted at the beginning of the 20th century that the edges of some continents (particularly South America and Africa) are similar in shape, concluding that the continents were connected and separated before. The problem was that it was not known how huge land masses could move across the Earth's surface. Such a movement requires enormous power and it was not known where it came from.
Later it was known that, according to plate tectonics, the continents move as a result of convection currents in the mantle. They slowly move away from each other, bump into each other, slide under each other, or rub against each other. This causes various surface phenomena, such as earthquakes, volcanism, and slow changes, such as subsidence, mountain building and the displacement of continents.
Learn more in brainly.com/question/19472435
Answer:
He will not perform well due to increased arousal.
Explanation:
Answer:
option A will be the best
Answer:
Jane Addams and Theodore Roosevelt
Explanation:
The Progressive Era in the history of the United States of America spanned between 1890s to the 1920s and there were aggressive political and social reforms which helped the nation grow better in the expected direction.
Jane Addams, born in September 6, 1860 was one of the notable Americans, who were the reformers at that time. She helped the nation by placing emphasis on certain issues affecting mothers ranging from the needs of children to public health of the local inhabitants.
Theodore Roosevelt, born in October 1858 was one of the reformers who dominated the political landscape at that time. He was the 26th president of the United States and he worked towards the realization of fairness in the dealings of citizens, the regulation of rail roads and good drugs and foods.
Virtually every crime gun in the United States starts off as a legal firearm. Unlike narcotics or other contraband criminal arms trafficking is widespread in regions of political turmoil, it is not limited to such areas, for example, in South Asia, an estimated 63 million guns have been trafficked into India and Pakistan.
While illegal guns often pass through multiple trafficking channels, the report confirms that corrupt gun dealers and gun shows present challenges to enforcement. Although gun dealers were involved in less than 10 percent of the investigations, they were associated with the largest total number of diverted firearms (over 40,000 guns) and the highest average number of guns per investigation (350). Gun shows had the second highest number of trafficked guns per investigation (more than 130) and were associated with over 26,000 diverted guns.
A firearm is any type of gun designed to be readily carried and used by an individual. The term is legally defined further in different countries (see Legal definitions).
Learn more about trafficking here
brainly.com/question/1263694
#SPJ4
