A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type of atom ... of sedimentary rocks. All these different sedimentary ...

The characteristics of the rocks that hold fossils can be as informative as the fossils themselves. There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all ...

New research reveals how rock strength plays a crucial role in erosion, shaping landscapes over millions of years.

There are lots of types of rock and each type has different properties and uses. For example, some are strong and hard but others are soft and sandy. Some rocks are harder than others. For example ...