The physical property that are being tested, when you break quartz to learn if it splits smoothly in a certain direction is called conchoidal fracture. I hope this is the answer you were looking for. This kind of fracture is actually a curved breakage that resembles the concentric ripples that can be seen in muscle cells.
Volcano, hills, island, canyon, desert, ocean, river, jungle, mountains, marshes, waterfall, and plains.
The most commonly used method of moving people and goods in Central Africa is by vehicles that can passed through roads. Most of the interior parts of Central Africa are wet terrain. This is the reason why roads are not paved in most of its areas because during wet season some roads become impassable and muddy. This then complicates transportation for many dwellers in the land.
