Question

a scientist tested four objects: w, x, y, and z. two of the objects were made of the same substance, and the other objects were made of different substances. the scientist collected the data in the table. which two objects are most likely made of the same substance? object mass shape soluble in water? conduct electricity? w 10 g cube yes no x 10 g ball yes yes y 15 g ball yes no z 15 g cube no yes

Explanation:

Step1: Compare mass

Objects with the same mass may be made of the same substance. Objects X and W have a mass of 10 g, and objects Y and Z have a mass of 15 g.

Step2: Compare solubility

Objects X, Y and W are soluble in water while Z is not. So X, Y and W are more likely candidates to be of the same substance compared to Z.

Step3: Compare conductivity

X conducts electricity, Y and W do not. Since Y and W have the same mass, solubility (soluble in water) and non - conductivity, they are most likely made of the same substance.

Answer:

Y and W