How Do Waterfalls Freeze?
Water becomes ice when its molecules move slowly enough to create stiff connections. Normally, the molecules in the waterfall move in response to both flow and thermal...
Read More
When Was the Thermometer Invented?
When Was the Thermometer Invented? The first practical thermometer or instrument for measuring temperature was invented shortly before the end of the 16th Century by...
Read More
Who Invented the Barometer?
Who Invented the Barometer? The barometer is an instrument for measuring atmospheric pressure. Evangelista Torricelli invented the barometer, also known as the...
Read More
Why Must a Fever Thermometer Be Shaken Each Time It Is Used?
Why Must a Fever Thermometer Be Shaken Each Time It Is Used? A fever thermometer is a special kind of thermometer. It shows whether or not you have a fever when you are...
Read More
What Is the Liquid in a Thermometer?
What Is the Liquid in a Thermometer? Most thermometers are sealed glass tubes with liquid inside. The liquid is either mercury, which is silvery, or alcohol, which is...
Read More