In the ____________________ method of protecting slopes, material ...

[storky111]

In the ___________________ _ method of protecting slopes, material is removed from the top of the slope and used as fill at the base.
 Fill in the blank(s) with correct word

Question 2

The two factors which determine whether or not an element can substitute for another element in the composition of a mineral are the ___________________ _ and ___________________ _ of the atoms.
 Fill in the blank(s) with correct word

[whitcassie]

Answer to Question 1

cut and fill

Answer to Question 2

size, chargecharge, size

[storky111]

Great answer, keep it coming

[atrochim]

Thanks for the timely response, appreciate it