Answer: large-scale horizontal movements of continents relative to one another and to the ocean basins during one or more episodes of geologic time. This concept was an important precursor to the development of the theory of plate tectonics, which incorporates it.The idea of a large-scale displacement of continents has a long history. Noting the apparent fit of the bulge of eastern South America into the bight of Africa, the German naturalist Alexander von Humboldt theorized about 1800 that the lands bordering the Atlantic Ocean had once been joined. Some 50 years later, Antonio Snider-Pellegrini, a French scientist, argued that the presence of identical fossil plants in both North American and European coal deposits could be explained if the two continents had formerly been connected, a relationship otherwise difficult to account for. In 1908 Frank B. Taylor of the United States invoked the notion of continental collision to explain the formation of some of the world’s mountain ranges.
Explanation:
Chemical weathering and mechanical weathering can be influenced by plants. Plants contribute to mechanical weathering when their roots growth through cracks and crevasses in soil or rock. Overtime the roots will break rocks apart. Some plants produce and secrete organic acids that can change the chemical composition of rocks causing them to weather. Mechanical weathering breaks rocks into smaller pieces while chemical weathering changes the composition of the rocks.
Answer:
They generate less GDP/capita revenue than developed ones in developing countries. Developed countries have larger industries with efficient services, while developing countries do not have the same diversity of sectors in the economy. In developed countries, life expectancy is higher than in developing countries and living standards are high in developed countries.
Explanation:
Answer:
The geocentric model appealed to mans' vanity, being in the center of everything. Simply, it satisfied their self-thought thus leaving no room for questioning its validity.
Explanation:
The geocentric and heliocentric models were the two main models proposed on how our solar system is laid out. Geocentric, coming from the word 'geo' meaning earth and 'centric' being center said that the Earth was the center of our solar system and the rest of the planets rotated and revolved around it. This model appealed to mans' vanity, this theory was promoted by Egyptian mathematician, Ptolemy. This theory was incorporated into religious dogma thus creating false credit. Ptolemy's calculations were correct, but his assumptions were not: the earth was motionless, circular orbits for planets, all celestial bodies orbit the earth etc. This was until Keppler and Galielo proved him wrong with his assumptions giving rise to the valid, Heliocentric model where the sun is the center of our solar system, planets have elliptical orbits and other planets had bodies orbiting them.
