However, they present many safety and environmental hazards. Because of alcohol’s high coefficient of expansion, mercury was chosen as a better candidate for filling thermometers. Galileo Glass Human's wildest dream now comes closer than ever with this remarkable necklace. The liquid paraffin inside the thermometer is flammable, so do not store the thermometer near an open flame. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. The Galileo thermometer does not use mercury, but instead relies on the density of liquids to tell the temperature. He has also written for several Web-based publishers. As the temperature outside the thermometer changes, the weights float or sink according to the density of the liquid in the tube. A Galileo thermometer is a very simple and surprisingly accurate thermometer named after Galileo Galilei, a noted 16th century scientist.While these thermometers are primarily kept around as novelty items, they can also be utilized as functional measures of the temperature. The most common type of thermometer consists of a vertical glass tube filled with alcohol or mercury. The weight suspended in the middle is closest to the temperature outside the thermometer. - Definition & Measurement, Friction Lesson for Kids: Definition & Examples, Thermal Expansion: Definition, Equation & Examples, The Kinetic Theory of Matter: Definition & The Four States of Matter, Changing States of Matter Lesson for Kids, Rectilinear Propagation of Light: Definition & Examples, What is Conduction in Science? This was the first time quantitative measurements, as opposed to relative measurements, could be made using a thermometer. If your thermometer breaks, open windows and keep children and pets away. Create your account. Paraffin is derived from petroleum, and in some cases can be toxic. The bulbs contain water and dyes or food colouring. The Galileo thermometer does not use mercury, but instead relies on the density of liquids to tell the temperature. Clinical Glass Mercury Oral Thermometer , Find Complete Details about Clinical Glass Mercury Oral Thermometer,Glass Galileo Thermometer,Thermometer Glass Tube,Oral And Rectal Thermometer from Temperature Instruments Supplier or Manufacturer-Shanghai Even Medical Instruments Co., Ltd. $ 95) is a simple, elegantly-designed decor piece. © copyright 2003-2021 Study.com. A platinum resistance thermometer has a resistance... a. This liquid mixture may contain alcohol, or it might simply be water with food coloring. Would like to know if anyone knows what liquid could have been in the thermometer. And this where the Galileo Thermometer comes in. The key is to not hold the thermometer in your hands because your hands will warm it up and give a skewed reading. - Facts & Calculation, What is Temperature? The liquid in Galileo thermometers need not be alcoholic or mercuric. If the bulb and vial are filled with a silver, metallic liquid, you have a mercury thermometer 2. They come in digital or analogue varieties. Hydrocarbons are used because they have a stronger reaction to changes in temperature than water, making it easy to take a quicker and more accurate reading. Mercury thermometer mounted on a glass plate on which the centigrade scale is written in red ink. Along the side of the glass tube are markings that represent the current temperature of the air when the height of the alcohol or mercury within the tube is at that marking. This fairly accurate instrument is based on the thermoscope invented by Galileo Galilei in the early 17th century. - Definition & Graph Analysis, Bernoulli's Principle: Definition and Examples, High School Physical Science: Homework Help Resource, Holt McDougal Modern Biology: Online Textbook Help, Glencoe Physical Science: Online Textbook Help, Holt McDougal Modern Chemistry: Online Textbook Help, Holt McDougal Physics: Online Textbook Help, Prentice Hall Chemistry: Online Textbook Help, AQA A-Level Chemistry: Practice and Study Guide, Virginia SOL - Chemistry: Test Prep & Practice, All India Pre-Veterinary Test (AIPVT): Exam Prep, BITSAT Exam - Chemistry: Study Guide & Test Prep, ILTS Science - Physics (116): Test Practice and Study Guide, ILTS Science - Environmental Science (112): Test Practice and Study Guide, SAT Subject Test Chemistry: Practice and Study Guide, CSET Science Subtest II Earth and Space Sciences (219): Test Prep & Study Guide, ILTS Science - Earth and Space Science (108): Test Practice and Study Guide, Biological and Biomedical Low, but they ’ re what allow us to make all of available! 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