Answer:
1. Gold was found on several Indian reservations during the 19th century, causing Indians to be relocated so Americans could mine the land for the gold, thus, expanding their territory. Eventually, the California Gold Rush caused expansion all the way out to the Pacific border.
2. Gold was highly valued, so with more gold, the US became a wealthier nation. When a nation has the money and resources, it can build an army, and a large Industrial society.
3. Some unintended consequences were the affects on natural wildlife and vegetation. Mining doesn't leave a pretty sight in its wake. Wildlife would be displaced and vegetation would be destroyed. A long term affect is less natural beauty for a mine that only lasted a short time. A short term affect would be the wildlife displacement. We can solve these problems by valuing other minerals, other than gold and silver.
Step-by-step explanation:
I hope it helps.