7. What happened to solid materials when
mixed with liquid?
I. Some solid materials completely
dissolved in the liquid materials
II. Some solid materials settled at the
bottom of the container while others
stayed with the liquid.
III. Some solid materials spread out evenly
in the liquid materials, but some do not.
IV. All solid materials dissolve when mixed
with liquid
A. I & II
B. III, II & IV
C. I, II & III
D. IV, III &II