She was a public school teacher and administrator for 11 years. These situations occur because of changes in pressure. Barograph: This barometer connects an aneroid barometer to a roll of graph paper. As the graph paper spins, a needle connected to the aneroid barometer draws a line that makes a graph of the pressure. “Barometer.” Dictionary, Merriam-Webster, credit-by-exam regardless of age or education level. Learn a new word every day. If you've ever blown bubbles into your milk, then you've seen how a barometer works. When did barometer become figurative? Heather has a bachelor's degree in elementary education and a master's degree in special education. Can you spell these 10 commonly misspelled words? Barometers help meteorologists predict weather because atmospheric pressure can indicate weather changes. 'Nip it in the butt' or 'Nip it in the bud'. Air has weight and presses down on the earth and everything in it. Understanding the weather can help people in many ways including keeping them safe from hazardous situations. I. As the air pressure surrounding the barometer increased, the pressure forced the mercury to move up the tube. They are useful for predicting changes in the weather. Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, National Weather Service: Definition & Mission Statement, Predicting the Weather: Tools, Maps & Symbols, Barometer Lesson Plan for Elementary School, What is a Barometer? All other trademarks and copyrights are the property of their respective owners. The test is used as a barometer [=standard] to measure a student's reading level. For example, if the pressure was steady, you would see a straight line. The tube is filled with mercury, the open end is covered, and the tube is then turned upside down with the covered end placed into a dish of mercury.The end is uncovered, and part of the mercury drains into the dish. © copyright 2003-2020 Log in here for access. They also have an interesting history regarding the man who invented them, how they got their name and what they meant to citizens in private society centuries ago. has thousands of articles about every As the air pressure decreased, the mercury moved back down the tube. Although this meaning is still very much in use, the word has taken on a strongly figurative sense denoting something that signals changes in conditions not necessarily related to the weather. If it increased or decreased, you would see a hill or dip in the graph. How to use barometer in a sentence. Barometer definition is - an instrument for determining the pressure of the atmosphere and hence for assisting in forecasting weather and for determining altitude. Services. This causes the springs inside to do the same. Aneroid: This barometer uses springs inside of a cylinder to measure changes in pressure. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Maybe you've flown in an airplane or hiked a mountain and felt your ears 'pop'. When it starts moving below this mark, there is low atmospheric pressure. - Definition, History & Function, How Meteorologists Predict the Weather: Methods & Process, Understanding Weather for Aviation: Reporting & Forecasting, Biological and Biomedical 's' : ''}}. When the true Barometer readings are 73 and 75 cm of Hg, the faulty barometer reads 60 cm and 70 cm respectively. Since mercury is considered dangerous and the liquid from a mercurial barometer could spill, meteorologists often use more advanced types of barometers. Accessed 27 Nov. 2020. To unlock this lesson you must be a Member. a legendary Broadway flop that has subsequently become the, But, part of the way the watch knows you’re swimming is by using the onboard, The annual shopping festival is closely watched as a, Hopkins and the World Health Organization set the, Dallas-Fort Worth continues to lead metro areas in the percentage of workers who’ve returned to their offices, according to Kastle System’s back-to-work, For in addition to supplying much of the raw material from which later efforts were fashioned, Dracula provided the redeeming moral, Post the Definition of barometer to Facebook, Share the Definition of barometer on Twitter. As the graph paper spins, a needle connected to the aneroid barometer draws a line that makes a graph of the pressure. study They are often included in smart phones and take into account other weather data, like wind and humidity, that can contribute to changes in weather. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. and career path that can help you find the school that's right for you. What made you want to look up barometer? All rights reserved. You can test out of the 2 : something that is used to indicate or predict something. Get the unbiased info you need to find the right school. just create an account. The higher you go up, like climbing a mountain, the less pressure there is because the air is thinner. As the air outside of the cylinder changes, it expands or contracts. Please tell us where you read or heard it (including the quote, if possible). Not sure what college you want to attend yet? Anyone can earn {{courseNav.course.mDynamicIntFields.lessonCount}} lessons imaginable degree, area of Send us feedback. Select a subject to preview related courses: Barometers measure atmospheric pressure. On the side of the tube, there were marks that corresponded to measurements in inches. Originally, barometer referred to an instrument that measures atmospheric pressure. Barometers are used by meteorologists to keep track of pressure in the air. This means that if you laid a square with one inch sides down near the ocean, it would have the weight of about three Chihuahuas pressing down on it. The earliest barometer was the mercury barometer. Log in or sign up to add this lesson to a Custom Course. Meteorologists use different instruments to measure and predict the weather. Learner's definition of BAROMETER [count] 1 : an instrument that is used to measure air pressure and predict changes in the weather. Did you know… We have over 220 college Create an account to start this course today. flashcard set{{course.flashcardSetCoun > 1 ? Earn Transferable Credit & Get your Degree. credit by exam that is accepted by over 1,500 colleges and universities. Get access risk-free for 30 days, To learn more, visit our Earning Credit Page. What is the total length of the barometer tube? Kids may find these facts useful and fun.


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