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Understanding Thermometers
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What is a thermometer used for?
A thermometer is used to measure temperature.
What substance do liquid-in-glass thermometers usually contain?
They usually contain mercury or colored alcohol.
What are the two temperature scales commonly shown on thermometers?
Celsius and Fahrenheit.
How does a liquid-in-glass thermometer work?
The liquid expands and rises in the tube as the temperature increases.
What is a digital thermometer?
A digital thermometer uses electronic sensors to measure temperature.
Where might you find a clinical thermometer?
In hospitals or homes for measuring body temperature.
Can thermometers measure both hot and cold temperatures?
Yes, thermometers can measure a wide range of temperatures.
What is the freezing point of water on the Celsius scale?
0 degrees Celsius.
What is the boiling point of water on the Fahrenheit scale?
212 degrees Fahrenheit.
What is an infrared thermometer?
It measures temperature by detecting infrared radiation from objects.
Why shouldn't you use mercury thermometers carelessly?
Because mercury is toxic if the thermometer breaks and spills.
What is the main advantage of digital thermometers over mercury ones?
Digital thermometers give quicker and more precise readings.
How can you tell if a thermometer is not working correctly?
If the readings are inconsistent or very different from expected values.
What is a bimetallic strip thermometer?
A thermometer that uses two different metals that expand at different rates to measure temperature.
What temperature scale is commonly used in scientific research?
The Kelvin scale.
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