The Berlin conference, sometimes called the congress of Berlin, was a conference in which Otto Von Bismarck convened the conference to determine the "ground rules" for conquering Africa so as to avoid war.
The first way to detect a black hole is by their gravitational influencee.
Answer:
Metamorphic rocks is your answer
A deep water wave is a wave way under water. A shallow water wave is a normal wave that you see on top of the water.