Answer:
The forty-eight states of the U.S. in the center of North America are called the contiguous United States or officially the conterminous United States.
Answer:
Child labor was virtually eliminated when, for the first time in history, the productivity of parents in free labor markets rose to the point that it was no longer economically necessary for children to work in order to survive.
Answer:
1. D
2. C
3. A.
4. B
Explanation:
1. D. Groups of people make tools of stone: this period is known as the stone age, and it occurred around 1.76 million years ago
2. C. Homo Sapiens make their first appearance in history: from research, the earliest homo sapiens to have been found dated to have existed 200,000 years ago in Africa.
3. A. In the Ice Age, people migrate to parts of North America: the migration was believed to have occurred between the Siberia in Asia (eastern part) and Alaska in North America around 20,000 to 25,000 years ago.
4. B. The start of the Neolithic Revolution: this period was believed to follow the Ice Age, and it began around 12,000 years ago.
1. A
2. A
3. D
4. C
5. B
I hope these helped!
