At one time in the Earth’s history, many people thought the world was flat. Which best explains why the model of the Earth is now round? Models are limited by the science—the more that was discovered, the better the model could be made.

Models are a representation of products to be made in future and are modeled after what people thought the earth might look like.

Models can only show representations of what is small, so the Earth’s model was poorly constructed.

Models can be changed and remodeled even if there is not enough science to support the change.

Models are limited by the science—the more that was discovered, the better the model could be made.

Explanation:

At some point in history the well known early civilisations all thought that the Earth was flat. This includes Greece, India, Israel and even China with China only ceasing to believe such as recently as the 17th century. This is because that was what the science of the time led them to believe and so they made models of the Earth based on what they thought was true.

As time went by however and evidence was discovered by scientists and philosophers such as Aristotle that the world was round, the models began to change to depict a Spherical Earth.

This proves that models are simply a reflection of the science of the time and the more things are discovered, the more the Science gets more accurate enough to make better models.

the industrial development of cities in the ruhr area in the nineteenth century is described. the research was based on english and german language sources. several factors that shaped growth and paths of the cities were categorized and analyzed. they are locations, resources, traditions, entrepreneurs, and technological developments. locations and resources were the most important among them; other factors may be regarded as consequences from locations and resources. among the cities, bochum, essen, gelsenkirchen, and dortmund had the richest resources and most favorable locations in the transportation network and grew to be the largest cities in the ruhr area near the end of the nineteenth century. riverside location was also a favorable factor for the development, as shown in the development of duisburg on the confluence of rhine and ruhr. resource distribution can explain the rise of textile industry, metallurgical industry, and coal and iron industries, and the northward progression of the mining industry. tradition was an important factor for cities such as krefeld, barmen, elberfeld, solingen, and remscheid, which experienced development based on their traditions through the nineteenth century. various entrepreneurs exerted influences within and beyond the local level over the ruhr area. technological development stimulated the northward progression of the mining industry and the deep connection between the coal and the iron industries.