Research scientists used a standard practice called the scientific method to help them understand phenomena.
Answer:The Industrial Revolution in the US helped to attract many more immigrants to the country. Immigrants tended to leave their home countries because they hoped that there would be more economic opportunity in the US. The fact that there was more opportunity in the US was due largely to industrialization.
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Answer: interacts with people, dresses themselves, brushes teeth, and works
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The Sierra Nevada is the mountain range that is between the Central Valley depression and the Basin and Range Provice
