A geyser is a hot spring which ejects hot water a vapors through a crack in the rock.

Amethyst is one of the most popular minerals with children

Amethyst is a common, purple form of the mineral quartz. Fairly hard, amethyst is a 7 on the Mohs hardness scale which has a range from 1 (softest) to 10 (hardest).

Is a River Young or Old? The Answer is in the Curves!

Rivers are natural water bodies which flow toward another water body such as another river, lake or ocean.