The pandemic caused roughly 10 million deaths. The plague was brought to North America in the early 1900s by ships, and thereafter spread to small mammals throughout the United States. The high rate of fatality during these pandemics meant that the dead were often buried in quickly dug mass graves
Plague was first introduced into the United States in 1900, by rat–infested steamships that had sailed from affected areas, mostly from Asia. Epidemics occurred in port cities. The last urban plague epidemic in the United States occurred in Los Angeles from 1924 through 1925. The pandemic caused roughly 10 million deaths. The plague was brought to North America in the early 1900s by ships, and thereafter spread to small mammals throughout the United States. The high rate of fatality during these pandemics meant that the dead were often buried in quickly dug mass graves.
The success of ancient Egyptian civilization came partly from its ability to adapt to the conditions of the Nile River valley for agriculture. The predictable flooding and controlled irrigation of the fertile valley produced surplus crops, which supported a more dense population, and social development and culture.
synthetic polyme - [using oil and gas as starting materials]
alloy - [mixing a metal element with other elements]
ceramic - [heating clay and sand at high temperatures]
Explanation:
Synthetic polymers are macromolecules formed by the union of monomers, obtained artificially. Examples of this type of compounds are polyethylene, nylon and bakelite. These polymers allow the manufacture of synthetic fibers with the aim of developing functional products (yarns and fabrics) and even medical articles. In the synthesis of polyamide yarns, a detailed quality control is carried out in order to regulate the thickness and the uniformity of the fibers so that they can have different utility.
An alloy is a combination of metallic properties, which is composed of two or more solid metallic elements. The alloys are made up of metallic elements such as Fe (iron), Al (aluminum), Cu (copper), Pb (lead), concrete examples of a wide range of metals that can be alloyed. The alloying element may be non-metallic, such as: P (phosphorus), C (carbon), Si (silicon), S (sulfur), As (arsenic).
Ceramics, is the art of making pots and other objects made of clay or other ceramic material by the action of heat, that is, cooked at a temperature higher than 400 or 500 degrees. The result is a diverse variety of pieces or terracotta objects - or "coarse" pottery -, earthenware and porcelain set. Besides naming the technique and its activity, it also gives name to the set of objects and production.
