Scientific answers must always be testable and scientific answers can change with new data and new methods.
true
false

True

Explanation:

A scientific question has to be testable and testable by other scientist. Scientifi answers change when new data and new method sare collected

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the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.