The Rock Cycle A rock is a naturally formed solid that is usually made up of one or more types of minerals. Some rocks however can contain no minerals such as Obsidian and coal.

The Rock Cycle Since the earth is a majority of rock there are many uses for it such as: The building of houses and skyscrapers

The Rock Cycle The sources of metals such as aluminum, iron, and copper

The Rock Cycle The carving of statues and other works of art

The Rock Cycle A base for pavement for roads and highways There are many famous monuments and structures made from rocks

Granite blocks from the Great Wall of China The Rock Cycle Granite blocks from the Great Wall of China

The Rock Cycle Limestone blocks make up the great pyramid in Egypt

The Rock Cycle At Mount Rushmore granite was carved for the four U.S. presidents

The Rock Cycle Rocks are always changing, by that change can take thousands to millions of years. The rock cycle is a set of natural processes that form, change, break down and reform rocks

The Rock Cycle The rock cycle never ends it goes on continually There are three types of rocks Igneous Rock when molten rock cools and becomes a solid. Igneous rock can form on the surface or at depths of the earth over time.

The Rock Cycle

The Rock Cycle Sedimentary rock forms when loose rock and other materials are carried by water and wind and then layered. Minerals can grow on this rock over time. Sedimentary rock can also form when water evaporates.

The Rock Cycle Metamorphic rock forms when heat and pressure cause older rock to change into new rocks. The heat and pressure can cause the rock and the minerals to change over time.

The Rock Cycle Most of earth’s crust is made up of igneous and metamorphic rock. 95% Sedimentary rock that forms in thin layers only make up 5% of the earth’s crust.