Do you want to know:
* How a thermometer works? This refers to the physical and chemical principles that allow a thermometer to measure temperature.
* What are the effects of using a thermometer? This could refer to the impact of taking someone's temperature, such as the potential for discomfort or the usefulness of the information gathered.
* What are the effects of temperature on a thermometer? This would be about how changes in temperature affect the instrument itself, such as its accuracy or lifespan.
Please provide more context so I can give you a helpful answer.
