As a GeoHeroes, we need to understand the elements of the Earth; minerals are examples of these elements.

A mineral is a solid material, made of one substance, that occurs Words to naturally on Earth. 
 

Click on the link below to learn more about minerals, then click on the GeoHeroes button to "test your knowledge!"

While reading, here are some words to focus on: 
luster
color or streak 
cleavage/fracture 
hardness 
magnetism 
fluoresence

 Minerals