science olympiad Crossword

Earth's water makes up the _______________
the hardest mineral
_________ is how the a mineral's surface reflect's light
A mineral that breaks along a smooth surface is called
rocks that are formed from cooled magma
Name the hardness scale
magma that flows out of the earth's surface
______ is the wearing down of rocks by wind, water, and rain
a large body of moving ice is called
name the earthquake scale
a giant ocean wave caused by an undersea earthquake
earthworms take in oxygen through their______
plants get their energy from
adult frogs have _______ that help remove oxygen from the air
changes in a form, in the life cycle is called