Mara and ivy are asked to identify two minerals in science class. To do this, they decided to study the physical properties of the minerals in the following ways. 1 examine how they freeze
2 determine how they break
3 rub them on a white tile plate . What is the best method for the girls to study the physical properties and

2 only is a pretty accurate answer the others dont make sense  to me.

Explanation:

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

1 is the answer to this problem