Question

exit ticket

1. describe the independent variable and dependent variable in your experiments today.
2. in what units did you measure your dependent variable?
3. what was the purpose of the control cup of water?

Explanation:

For question 3, in experimental design (a key concept in Natural Science, especially in scientific method - related experiments), a control group (or in this case, a control cup of water) is used to provide a baseline for comparison. It helps to determine if the changes observed in the dependent variable are due to the manipulation of the independent variable (or other factors) by having a group/condition that is not exposed to the independent variable's manipulation. So the purpose of the control cup of water is to serve as a baseline to compare the results of the experimental group(s) against, to see if the independent variable has an effect.

Answer:

The purpose of the control cup of water is to act as a baseline (or control group) to compare the results of the experimental setup against, helping to determine if the independent variable has an effect on the dependent variable by providing a reference condition with no manipulation of the independent variable.