Which is not a property of a mineral?
a. refraction
b. hardness
c. streak
d. luster

At a continent-continent convergence,

Based on this map, which statement about africa’s economic activity is most accurate? a) coastal countries are all members of opec b) economic development is more common with opec nations c) coastal countries have more access to productive resources d) economic development is more common above the sahara desert

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade