#1) Sand grains can be distinguished from silt grain by ____.
Answer: The answer is size. Sand grains are finer than gravel and coarser than silt. Sand is a naturally occurring granular material composed of finely divided rock and mineral particles. Silt is granular material silt particles are larger than clay but smaller than sand particles, whose mineral origin is quartz and feldspar.
If you search the coordinates it leads to a point in the ocean off the east coast of South America, the -3780m implies whatever is there is under the ocean, it would require high tech gear to reach that depth, since the box from mpk's video is said to be from the Mariana's web than that location could be were Atlantis was and or is resting but that's just me connecting the dots and I could very well be off by a Longshot
It's an elastic wave in the earth produced by an earthquake or other means. hope it helps!
High levels of dissolved oxygen
The answer is B ..........