The rock cycle

The Earth is an active planet. Earthquakes shake and volcanoes erupt. Sections of the crust are on the move. Mountains...

Rocks are not all the same. Some are heavy, some are light. Others are dark, while some can be almost...

The Earth is an active planet. Earthquakes shake and volcanoes erupt. Sections of the crust are on the move. Mountains...

Most sedimentary rocks are laid down in flat, horizontal layers. These can later tilt and fold due to tectonic activity,...