The color of a mineral when it is powdered is called the streak of the mineral. several minerals have a black streak and make it difficult to identify the mineral with the streak test alone. but a red-brown streak is not very common. we would expect to produce a red-brown streak.

Long ago, people who lived in coastal north africa most often interacted with

The map above shows where people live in the united states. areas that are darker blue are areas where people live close together. areas that are lighter colors are places where people live farther apart. as a geographer, if you were to study where people live and why they choose to live in these places, which of the six essential elements of geography would you be using?

[fw.02]sinkholes are often formed as a result of the actions of. a.heat on recharge b.pressure on aquifers c.acid in groundwater d.minerals in hot springs