I used a hot plate to heat up 100ml of hot water to 100 degrees celsius. I then

Question

I used a hot plate to heat up 100ml of hot water to 100 degrees celsius. I then placed the 100 ml of heated water into a graduated cylinder. Next I placed the graduated cylinder in refrigerator. Then I measured the volume every time the water had a 10 degrees change in temperature. I did this until the water has cooled to 20 degrees celsius. I repeated this three times in order to have three separate trials with three separate sets of data.

Which variable is the independent variable and which is the dependent variable? What are the control variables?

Explanation / Answer

Here time is the independent variable. As it is in our hands to choose the time interval.

Volume is the dependent variable as it is being measured with respect to changing time.

Temperature is the control variable as volume depends on it.

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