Ever wonder how Earth scientists examine rocks? We cut them up and throw them under a microscope ... and then everything ...

There are lots of types of rock and each type has ... and hard but others are soft and sandy. Some rocks are harder than others. For example, granite is a very hard rock. This makes it a good ...

There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all fossils are preserved in ... either at the surface (lava), or underground (as granite or other ...