The ratio of a substance's weight, especially a mineral, to an ...

[melina_rosy]

The ratio of a substance's weight, especially a mineral, to an equal volume of water at 4C is called its
  ___________________ Fill in the blank(s) with the appropriate word(s).

Question 2

The silicon atom of the silica tetrahedron has a (+/-) ___________________ _ charge of
  ___________________ _ (number?) and the oxygen atoms have a (+/-) ___________________ _
  charge of ___________________ _ (number?). Therefore, the ion group has an overall (+/-)
  ___________________ _ charge of ___________________ _ (number?). Fill in the blank(s) with the appropriate word(s).

[okolip]

Answer to Question 1

specific gravity

Answer to Question 2

positive, four, negative, two, negative, four