AI Tutor
Have you ever looked at a digital weather screen or held a digital body thermometer when feeling sick?
Instead of waiting for colored liquid to slowly rise up a tube, a digital thermometer uses electronic sensors to show the exact temperature as numbers instantly.
How do we make sense of all the symbols and decimal dots on the screen?

Inside the Digital Display

Temperature measures how hot or cold something is, and we measure it in degrees Celsius (∘C^\circ\text{C}).
In 1742, Swedish astronomer Anders Celsius created this scale by setting the freezing point of water to 0∘C0^\circ\text{C} and boiling to 100∘C100^\circ\text{C}.
What does a reading like 37.2∘C37.2^\circ\text{C} tell us about the real world?

Reading Everyday Temperatures

To read a digital display, say the whole number first, say 'point', read the tenths digit, and finish with the unit name.
For example, 37.2∘C37.2^\circ\text{C} is read as thirty-seven point two degrees Celsius, which is a normal, healthy human body temperature.
What happens when the air gets colder than freezing ice?