Why did the United States expand to Alaska and to islands in the Pacific?

To attain resources such as fur, timber and minerals, and gold and to attain naval bases to protect their economy expansion.

Explanation:    B R A I N L I E S T    P L E A S E

Explanation:

The US purchased Alaska, the Alaska Purchase, in 1867. It was bought by the US because Russia wanted to sell it fearing it would be seized if was broke out with Britain. Many Americans believed the United States needed to expand to keep its economy strong.

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the lines on a surface map are called isobars. isobars are lines of constant pressure which are measured in units called millibars. the numbers indicate the amount of air pressure, in millibars, that each line represents.