1. Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water.
Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form".
Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rocktypes, the others being sedimentary and metamorphic.
2.Igneous rocks - Granite
Sedimentary rocks - Sandstone
Metamorphic rocks - Marble
3. Stratification is a system or formation of layers, classes, or categories.
5. By studing the rock you can find what happened to that rock and how old it is and how broken down the earths layers made it that way
7.Thousands of layers of sedimentary rock provide evidence that allows us to determine the age of Earth’s changing surface and to estimate the age of fossils found in the rocks.
8. You have read about mountain formation, earthquakes, and other ways in which Earth changes over time. Scientists have learned about these changes that happened long ago—by studying rocks, fossils, and other natural evidence.