How did the thermometer develop?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How did the thermometer develop?

The Big Idea

How hot or cold is it? A thermometer tells us! It took many inventors to make one.

Galileo

Step one: Galileo. Around 1600, Galileo built a device that showed changes in temperature. But it had no scale to read.

Scales

Step two: Scales. Daniel Fahrenheit made a mercury thermometer with a scale in 1714. In 1742, Anders Celsius made a scale based on the freezing and boiling of water.

Today

Step three: Today. Canada uses Celsius, and the United States uses Fahrenheit. Today thermometers use liquid, metal strips, or electronic sensors.

A Closer Look

Let's take a closer look! Water freezes at 0 C. It boils at 100 C. Canada uses Celsius. The US uses Fahrenheit.

Quick Facts

Quick facts! Mercury thermometers are being replaced because mercury is harmful. 0 Celsius is 32 Fahrenheit. Digital ones use sensors. Galileo started it.

Think Like a Scientist

Now, think like a scientist! Fill three cups with cold, room-temperature, and warm water. Make sure the warm water is not hot. Measure each with a thermometer. Read both Celsius and Fahrenheit. Write down your results.

Outro

The thermometer developed from Galileo's scale-less device to Fahrenheit's mercury thermometer and Celsius's water-based scale. Today, thermometers use liquids, metal strips, or sensors. Now we can measure temperature almost anywhere. Science is amazing! Keep wondering and keep exploring! Share what you learned with someone at home, and see what they think! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!