While we make use of many varieties of data, our primary sources come
from county tabulations drawn from the U.S. censuses of population
and agriculture. We have collected those data for the decennial
population censuses from 1880 through 2000, as well as for the
agricultural censuses (which were decennial until 1920 and then more
frequent thereafter) from 1880 through 1997.3 In addition to
census-based sources, we have collected other county-level
tabulations of social characteristics. We use the population and
social indicators data to understand population structure and
change, and the agricultural census data to understand agricultural
land use. Their consistency, as well as the effectiveness and
long-term quality of the U.S. census, have made this part of our
project straightforward. Some of these data were available to us in
digital form, and others we collected in print form and then
hand-keyed into our database. All of these data are described in
Gutmann et al.
(1998). Since that document was published, we have added
data from recent censuses (1997 agriculture and 2000 population),
while maintaining their content and structure. Although our study
area is not coterminous with the 10 states, we have collected data
that covered the entire area of the 10 Great Plains states, and
often neighboring states, especially Iowa and Minnesota.
The correct answer is Christopher Columbus.
Christopher Columbus is the European explorer credited with being the first European explorer to encounter the Americas. In his first voyage in 1492, Columbus landed in Hispaniola (modern day Dominican Republic). This encounter lead to several other European explorers setting out to colonize these new lands as a means to gain wealth.
During the prosperous 1920's<span>, bank failures, together with low incomes among farmers and factory workers, helped set the stage for the </span>depression<span>.</span>
The correct option is B) Stone, Bronze, Iron
There are three ages: Stone Age, Bronze Age and Iron Age. These ages are divided chronologically according to the material with which tools were created: We have the Stone Age in first place since stone was used to make implements. This age is a pre historic period between 8700 and 2000 BCE. In the second place we have the Bronze Age, in which bronze was mainly used to create tools. During this age, early characteristics of urban civilization were found. And finally, we have the Iron Age. During this period, tools and weapons were made of carbon steel (ironworking).
The system of dividing the ages in 3 categories was created by C.J. Thomsen in order to classify objects according to the material with which they were created.
Answer: The emergence of cities.
Explanation:
The growth of trade activities during the Middle Ages in Europe resulted in the emergence of the city's medieval model. In this context, it is possible to talk about population growth so that trade, cities, and population growth are closely linked. Over time, the trade will be one of the factors that will encourage people to make new geographical discoveries.
