You are given an unknown liquid and asked to determine its identity. you can measure only one physical property. you decide to heat the liquid. you record that the liquid turns to vapor at 100°c. this demonstrates which physical property?

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?