The time units used by scientists to divide
Earth's history are part of the geological time scale. The geological time
scale measures the timing and the relationships of specific occurrences in the
history of the Earth. It is used mostly by geologists and paleontologists. They
define the earth's history by studying the Earth's composition then connect
facts to major geological or paleontological events. <span>
<span>Through
the use of a geological time scale, scientists have found discoveries and put
together the missing pieces of the past. Probably, the most distinguishable event discovered through
the geological time scale is mass extinction of species.</span>
</span>
Answer:
The transcontinental railway had a major effect on how Americans perceived thier nation, and it became a symbol of America's growing industrial power and a source of confidence that led them to take on even more ambitious quests.
John Rolfe was the colonist who brought tobacco seeds and first grow tobacco in Virginia.
The following were the results of tobacco:
profit in Virginia, conflicts with American Indians over land, an influx of indentured servants and the establishment of the Headright system.
B Samuel Morse because he made the "Morse Code" and he wanted to make it wireless too I assume
In the early morning hours of June 4 1989 troops advanced into central Beijing along major thoroughfares, killing both demonstrators and bystanders.
