Word house

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Across
  1. 2. is the division of cells in the early embryo
  2. 4. a thing that is composed of two or more separate elements
  3. 6. It is usually obtained by rubbing the mineral on a hard, white surface
  4. 7. is any separation in a geologic formation, such as a joint or a fault that divides the rock into two
  5. 9. existing by nature and without artificial
  6. 11. is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion
  7. 12. an element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei
Down
  1. 1. is the emission of light by a substance that has absorbed light or other electromagnetic radiation
  2. 3. hardness, rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised
  3. 5. is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes
  4. 8. is the way light interacts with the surface of a crystal, rock, or mineral
  5. 10. is a solid material whose constituents are arranged in a highly ordered microscopic structure