Wind is the agent of erosion that creates sand dunes. The wind blows grains of sand into a sheltered or otherwise secure location, allowing gradual accumulation.
The Bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace. The key principle is removal of impurities from the iron by oxidation with air being blown through the molten iron.
According to Wikipedia.com
Egypt's upper class was made up of the wealthy people (nobles, priests) and they usually work as government officials. These people lived on large estates in big cities.
Egypt's middle class were the people who ran small businesses or produced goods. (They were mostly artisans)
The lower class mainly consisted of farmers (who made up the majority of the population)
The Egyptian society was divided into social groups based on wealth and power.
Answer:
La investigación social permite nuevos conocimientos o estudia una situación social para diagnosticar necesidades y problemas con el propósito de aplicar los conocimientos con fines prácticos de todos los tiempos (investigación aplicada).
Explanation:
