A fun way to learn the 3 rock types, how they're formed and how they fit into the overall rock cycle. Newsletters Games Share a News Tip. Featured. Featured. Breaking News. White House Watch.

Unlike some types of friction, triboluminescence doesn’t create heat but instead creates light. Like much bioluminescence, it is a cold light. Apparently, the light can be different colors ...

This response depends on the type of stress, the rate at which it is applied, the environmental conditions of the rocks (such as temperature and pressure), and their composition.