We often think of atoms as tiny spheres, but in fact they are made from smaller particles called protons, neutrons and electrons. For example, the rock ... 3 Sedimentation Layers of sediment form ...

There are three main types of rock: igneous rock, metamorphic rock ... The oldest layers, along with the organisms that were fossilized as they formed, are deepest. The youngest layers are found at ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Why don’t rocks burn? – Luke, age 4, New Market, ...

What FACTS ABOUT ROCKS do you know? They are abundant on earth, and yet little is known about them. These facts will increase your knowledge of the rocks.

They are formed of simple molecules or individual elements arranged in repeating chains, sheets, or three-dimensional arrays. Minerals are typically formed when molten rock, or magma, cools ...