Answer:
Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books. A secondary source describes, interprets, or synthesizes primary sources.
Explanation:
hope this helps :D
According to some academics, the Bubonic Plague improved considerably many aspects in Europe. European cities began to improve the health conditions in both the streets and homes. Drainage and sewerage services began to be used in order to prevent future plagues.
The reduction in the population also affected the economy of some European countries in a positive way. The working force was considerably reduced, causing a greater demand for workers and increases in wages. Therefore, the purchasing power of the people increased as well as the standards of living.
The quality of the fields also improved considerably. The decrease in the population reduced the need to cultivate quickly, so the crops had more time to be harvested. Also, with a reduction in the number of people who inhabited the land, there was more space in lands to be cultivated. As a result, the population was able to acquire better-quality products.
Answer:
The Cold War ended in 1991 when the USSR collapsed.
Answer:When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.
