What is a spirit filled thermometer?
The alcohol thermometer or spirit thermometer is an alternative to the mercury-in-glass thermometer and has similar functions. Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly.
How does a spirit thermometer work?
Alcohol thermometers work by enclosing a narrow capillary attached to a bulb of reserve fluid. As the temperature heats up, the alcohol expands, rising up the capillary. As the temperature goes down, the fluid contracts, dropping down the capillary.
What is a thermometer definition for kids?
A thermometer is an instrument for measuring or showing temperature (how hot or cold something is). One type of thermometer is a narrow, concealed glass tube containing mercury or alcohol which extends along the tube as it expands.
How does an alcohol thermometer work kids?
Glass bulb thermometers work because liquids, such as water, alcohol, or mercury, expand slightly when the temperature rises. If the liquid is trapped in a narrow tube, it has nowhere to go but up.
What are thermometers filled with?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
What do they use in thermometers?
Mercury is one of the most familiar materials used in liquid thermometers. Other liquids, such as kerosene or ethanol, may also be used in these types of thermometers. When heat rises, the liquid expands from a bowl or bulb into the empty area, climbing up the tube.
How do you use a thermometer for kids?
Place the tip of the thermometer under your child’s tongue toward the back of the mouth and ask your child to keep his or her lips closed. Remove the thermometer when it signals that it’s done and read the number. If your child has been eating or drinking, wait 15 minutes to take his or her temperature by mouth.
What is a thermometer Class 3?
A thermometer is an instrument which is used to measure the temperature of a substance.
What are 3 types of thermometers?
Types of thermometer
- Digital thermometers. Digital thermometers are quick to use, reasonably accurate and can be used under the armpit (always use the thermometer under the armpit with children under 5).
- Ear (or tympanic) thermometers.
- Infared thermometers.
- Strip-type thermometers.
- Mercury thermometers.
What happens if you accidentally swallow mercury?
If it is swallowed, like from a broken thermometer, it mostly passes through your body and very little is absorbed. If you touch it, a small amount may pass through your skin, but not usually enough to harm you.
What is thermometer short answer?
A thermometer is a tool that measures temperature — how hot or cold something is. Thermometers are used to see if you have a fever or tell you how cold it is outside. Made up of thermo (heat) and meter (measuring device), the meaning of the word thermometer is pretty straightforward.