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This picture was taken shortly after trial 3 was finished.

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This is an example of part of convection. The faint lines are the flavoring.

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This photo was taken shortly after trial 2 was finished.

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This photo was within a minute of trial 3.

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This photo was taken within a minute of trial 2

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I would like to learn how temperature affects dissolving.

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All in all, my hypothesis was confirmed by the experiment and the answer to my question is the hotter the water, the more convection which results in faster brewing. One thing I learned from this experiment is that temperature not only affects the amount of time it takes, but also the direction the flavoring goes out of the tea bag and the color. In the hot water, there is a lot of convection, making the flavoring move all around the water. However, there is a lack of convection in the room temp and cold water, and the water is denser. One thing that might have affected the results of the last trial was that in the hot water, the tea bag sat on the side instead of laying on the top layer. It affected how much tea got dissolved. In the future, I would make sure every time, the tea bags got set in the same way. A new experiment I might do is to find out how the way the tea bag lays in the water affects the amount of tea brewed.

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As you can see from the table, the hot water brewed the fastest in all trials. One thing I observed was the temperature also affected the color. In the hot water, the color was a dark brown. In the room temperature water, the color was a golden brown. In the cold water, the color was a light gold. Also, the hot water was done approximately 3 minutes before the cold water in trial 1,  24 minutes before cold water in trial 2, and 21 minutes before the cold water in trial 3. Another qualitative observation I made was in the hot water, the tea flavor spread all around the water. However, in the room temp water and cold water, the flavoring sank to the bottom.

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amount of water

kind of water

kind of tea

kind of jar

kind of stopwatch

kind of measuring cup

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The time it takes to brew the tea.

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The temperature of the water

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*= do with adult supervision

1. use measuring cup measure out 1 cup of water and put into one of the mason jars. Do this 3 times.*

2. adjust the temperatures by using  the ice and microwave.* (after adding ice,  remeasure 1 cup and discard the rest of the water.)

3. Measure the temperature of each jar.*

4. Start to brew the tea by dropping the tea bags into each mason jar at the same time and start the timer. Wait until finished.*

5. Make observations about discoveries!

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Water

Tea bags (lipton tea bags)

three 16 fl oz mason jars

scientific thermometer

measuring cup

stopwatch

microwave

ice

paper

writing materials

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ACS Middle School Chemistry. (2018). "Does Temperature affect dissolving?" Retrieved from the internet on May 28, 2018. Available at:  http://www.middleschoolchemistry.com/lessonplans/chapter5/lesson6
Gardener, Robert. Really Hot Science Projects with Temperature. Berkeley Heights. Aldershot, 2003.
Hunter, Rebecca. Hot and Cold. Austin: Raintree Steck-Vaughn, 2001
Inquiry in Action. (2007). "Investigation 4, Dissolving Solids, Liquids, and Gasses." Retrieved from the Internet of May 28, 2018. Available at:  www.iquiryinaction.org/cahpter4/Inv4.pdf
Nelson, Ron(2018) "Chemistry for kids: Solutions and Dissolving." Retrieved from the Internet on May 28, 2018. Available at: https://www.ducksters.com/science/chemistry/solutions_and_dissolving.php

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If I brew the tea in hot water, then convection will increase, causing the tea to brew faster in hot water.

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How does the temperature of the water affect the brewing of tea?