Short Answer 
The experiment involves manipulating two independent variables, mass and type of material, in Part I, while only the type of material is manipulated in Part II. The dependent variable measured in both parts is temperature, which helps assess how different materials and masses influence thermal energy transfer.
Step 1: Identify Independent Variables
In Part I of the lab, two independent variables were manipulated: mass and type of material. These are factors that you change to observe their effects on the outcome. Understanding these variables helps clarify what you are testing in the experiment.
- Mass
- Type of material
Step 2: Recognize the Focus of Part II
In Part II, only the type of material is manipulated as the independent variable. This means you should only change the material while keeping other conditions constant. It is important to isolate this variable to see how it affects the results in your data collection.
Step 3: Determine the Dependent Variable
The dependent variable in both parts of the lab is the temperature. This is the variable that you measure to see how it responds to changes in the independent variables. Accurately measuring temperature is crucial to understanding how different materials and masses transfer thermal energy.
- Temperature