(Q).
The more branching there is in isomers, the lower the boiling and melting points are.  Eric added branching isomers to one solution, and left the other solution alone. The isomer solution now has a lower or higher boiling point?
(A).
lower


(Q).
The higher the crests of a wave are, the greater the amplitude.  The waves in the ocean are tall meaning they have a high or low amplitude?
(A).
high


(Q).
In erosion, a slower moving stream will only carry smaller particles.  A slow moving stream is capable of carrying larger or smaller particles than a fast moving stream?
(A).
smaller