Philip Gray

Biology

12 March, 12:50

1. amorphous the amount of kinetic energy that a material can absorb without breaking 2. cleavage a break that does not follow a flat surface, but rather is rough and uneven 3. crystal a single chemical compound or element that is found in nature 4. fracture a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns 5. hardness a non-crystalline solid having no orderly arrangement of molecules 6. mineral a clean break parallel to planes of weakness in a crystal 7. toughness resistance to being scratched