easy · Enhanced ACT science
A student measures the density of four unknown liquid samples (A, B, C, D) by measuring the mass of 10 mL of each liquid. The student uses the same graduated cylinder and electronic balance for every measurement.
In this procedure, the 10 mL volume of liquid is:
- A constant (controlled variable)
- The dependent variable of the study
- The independent variable being tested
- The control group for the experiment
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