Question

In Part I, the independent variable, the one that is intentionally manipulated, is
.

In Part II, the independent variable changes to
.

The dependent variable, the one you measure the response in, is the same for Parts I and II. For both parts of the lab, the dependent variable is
.

Answer 1

I don’t have the lab handout or any description of Parts I and II, so I can’t fill those blanks for you specifically. Tell me what the experiment(s) are or paste the part of the lab that describes Part I and Part II and I’ll fill them in.

If you want to figure it out yourself, here’s how:

- The independent variable is the quantity you intentionally change between trials in that part of the lab (the “what I change”).
- The dependent variable is the quantity you measure in response (the “what I measure”).
- If the lab has two parts with different manipulations, name the variable you changed in Part I for the first blank and the variable you changed in Part II for the second blank. If the measured quantity is the same in both parts, put that measured quantity in the third blank.

Examples:
- Simple pendulum lab:
- Part I independent variable = length of the pendulum
- Part II independent variable = mass of the bob (or amplitude, depending on the design)
- dependent variable = period (time for one oscillation)
- Hooke’s law/spring lab:
- Part I independent variable = attached mass (force)
- Part II independent variable = spring constant (if comparing springs) or displacement if you change something else
- dependent variable = spring extension (displacement) or force vs. extension as the measured response
- Ohm’s law:
- Part I independent variable = voltage applied
- Part II independent variable = temperature of the resistor (if that’s what you change)
- dependent variable = current

If you paste the lab instructions or describe what was changed/measured in each part, I’ll fill in the blanks exactly.