My prediction: My prediction is the relative volume of cold water compared to the hot water. This will happen because the volume of cold water is greater, hence, the heat transfer from hot water will be distributed even more.

Measure out cold water from the tap (just use the coldest water you can get) to the marked line in your cup and pour into one of the other cups. Repeat this process so you have twice as much cold water.

Measure out hot water from the tap (just use the hottest water you can get) to the marked line in your cup and pour into one of the other cups.

Based on your predicted the thermometers, what do you think the temperature is now?

Temperature of hot water = _______ C

Temperature of cold water = ______ C

Predicted final temperature when they are mixed = _______ C

Prepare to use your stopwatch.

Pour the two liquids into a third cup and measure the final temperature. The final temperature is relatively stable, so when the temperature stops changing, you've reached the final temperature. Measure the time it takes to reach this stable temperature.

Actual final temperature = ______ C

Time it took to reach a stable temperature: ______

Is there a difference between your prediction and what you observed? What might be an explanation for this?