Final answer:
The solubility of solid substances generally increases as temperature increases, but it varies between solutes. Experiment results that provide evidence for this conclusion support the idea that solubility increases with temperature, while results that contradict this conclusion or show no clear pattern bring it into question or are considered neutral observations.
Step-by-step explanation:
The solubility of a majority of solid substances increases as the temperature increases. However, the effect is difficult to predict and varies widely from one solute to another. The temperature dependence of solubility can be visualized with the help of a solubility curve, a graph of the solubility vs. temperature.
Observations that support the conclusion that solubility increases as temperature increases would be if the experiment results show that the solubility of a substance increased as the temperature increased. Observations that bring into question this conclusion would be if the experiment results show that the solubility of a substance did not increase as the temperature increased, or if there was no clear pattern. Neutral observations would be if the experiment results did not show a direct relationship between solubility and temperature.