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Q&A for How to Make a Thermometer
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QuestionWill it not do anything if it's really cold?Meredith Juncker is a PhD candidate in Biochemistry and Molecular Biology at Louisiana State University Health Sciences Center. Her studies are focused on proteins and neurodegenerative diseases.If the water freezes, then it cannot move up or down the straw. So anything below 32 degrees Fahrenheit (0 degrees Celsius) can't be recorded.
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QuestionWhy is hot going up and cold going down?Meredith Juncker is a PhD candidate in Biochemistry and Molecular Biology at Louisiana State University Health Sciences Center. Her studies are focused on proteins and neurodegenerative diseases.In hotter temperatures, liquids expand. This forces the liquid up the straw, mimicking the mercury effect in thermometers. In colder temperatures, it contracts.
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QuestionWhat should I do if the water won't go into the straw?This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.wikiHow Staff EditorStaff AnswerMake sure the top of the straw isn't covered by the modeling clay or else it won't work.
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QuestionHow do you mark the temperature marks?This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.wikiHow Staff EditorStaff AnswerUse a permanent marker on the side of the bottle to mark different temperatures.
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QuestionI made a thermometer and it does not work. How do I fix it?Community AnswerReverse engineer what you did until you work out where you went wrong. Or, just build a new one and be more careful in following the instructions this time.
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QuestionHow does the temperature work?Community AnswerIf you are using the jar and balloon homemade thermometer, the colder it gets, the lower the ruler goes; the hotter it gets, the higher the ruler goes.
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QuestionWill this thermometer spill if it's turned upside down?Community AnswerYes, as the top of the straw isn't covered, if you turn it around the liquid will drain from the straw.
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QuestionDoes the straw need to move when I make my own thermometer?Community AnswerNo; if the straw were to move, the accuracy would be incorrect or low. If that were to happen, you wouldn't be able to measure the exact temperature.
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QuestionWhy is the straw needed in the thermometer?Community AnswerIt carries the liquid up to show you the temperature of the room.
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QuestionI don’t have a clear straw, what should I use instead?Community AnswerMaybe use a thin white straw or any other color that is translucent. If you don't have a white straw (or any other color) you could put a lot of food coloring into the liquid to make it really dark.
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QuestionCan I use a color other than red?JmichalsbrownCommunity AnswerThe food coloring simply makes it easier to see the water level in the straw. Use any color you want.
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QuestionWhat else can be used besides a water bottle?Community AnswerUse cups that are plastic and tall so it doesn't go everywhere on your counter or floor.
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QuestionCan I use hydrogen peroxide to make a thermometer?Community AnswerA not so good choice. Hydrogen peroxide is not a stable compound that will resist temperature changes of a thermometer, it'll dissociate with time.
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QuestionIf we put it at the bottom why won't the mercury go up?Community AnswerIf you put the straw at the bottom, the liquid can't enter the straw, therefore, the liquid cannot go up or down.
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QuestionI how do we know what the warm water’s temperature is?Community AnswerYou use a laser thermometer (or other thermometer) to test the water. Then, you mark the temperature at the area the liquid in the straw is.
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