1. A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other.
2. Earth's core is the very hot, very dense center of our planet.
3. A crystal or crystalline is a solid material whose constituent are arranged in a highly ordered microscopic structure.
4. The coast is the land along a sea.
5. A plain is a broad area of relatively flat land.
6. A rock is a naturally occurring and coherent aggregate of one or more minerals.
