Petroleum products. So oil and natural gas etc.
Jewelry and precious stones come in second.
Answer:
The purpose of a map scale is to help the user to know the distance between 2 or more cities or geographical elements.
Answer: The primary cause of monsoons is the difference between annual temperature trends over land and sea.
Explanation:
Often, waterfalls form as streams flow from soft rock to hard rock. This happens both laterally (as a stream flows across the earth) and vertically (as the stream drops in a waterfall). In both cases, the soft rock erodes, leaving a hard ledge over which the stream falls
