4. how would you use crystal structure to tell a crystal of pyrite from a crystal of gypsum?

Crystal structure is a way how atoms or molecules are arranged and in what manner to form a Crystal and  this arrangement helps to differentiate one crystal from the other.

Using a crystal structure we can tell that crystal of pyrite is cubic and crystal of gypsum is mono-clinic which helps to tell us that both the crystals are separate from one another because of the arrangement of the molecules and atoms in both.

the answers for the whole quick check is

1. b

2. b

3. a

4. c

5. b

6. a

7. d

answer; ///i believe the correct answer to the above question is; ///(drainage basin;