Yes, imperialism exists in the modern age. They are not exactly the same as the ones we read in our textbooks, but they do still exist in modern age. An example is Cultural imperialism. Where America influences others through the internet such as social media, music, brands, moves etc.
Answer:
a. three directions at ~90°
Explanation:
Galena is known for its presence in all types of rocks (igneous, metamorphic and sedimentary rocks). It is predominantly ore of lead which has a chemical configuration of PbS and lead sulfide. Also, newly severed chunks of galena display excellent cleavage in three directions at ninety degrees.
Hence, in this case, the correct answer is "galena’s cleavage is best described as three directions at ~90°"
