1. by shift or weathering
2. made by melted lava and when lava hardens
3. layers of sediment building and forming into rock
4. depending on how it melted and formed together. Whether it "dries at the same time or if it doesn't"
5.it could fall down and create more sediment layers
6.Sedimentary rock forms from layers of sediment building up
igneous rock forms from melted lava hardening
metamorphic rock forms from heat and pressure "melting or forming rocks"
I hope this helped a little at least let me know