During the Civil War the northerners fought because they were against slavery, the southerners fought because the slaves did the work for them.
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Answer:
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Answer: Four geological ages.
Explanation:
he development of the country is divided into four geological ages, prehistoric or Precambrian, ancient or Palaeozoic, Middle Ages Mesozoic, and New Age Cenozoic.
- The Precambrian period begins after the formation of the Earth's crust and lasts about 4 billion years, and it is the oldest and most extended period of Earth's history.
- The beginning of the old age was marked by intense volcanic activity and the Ice Age.
- The Middle Ages were the period of the dinosaurs who were the dominant beings of that period.
- The new age, or the age of mammals, begins with the change of the warm and cold periods and continues to this day.
