Thermometers are known for measuring temperature. However, the thermometer could be used to measure the temperature outside, or it could measure the temperature in a soup or other recipe. Then the cook would know how hot it is. However, there are also different types of thermometers. They may look different because they are used for various purposes.
If there is something that’s temperature is usually close to other things in that category that use that same thermometer, then the intervals might only be one degree apart. However, a thermometer that measures things that could have a wide range of temperatures, then they would have intervals that are spaced further apart. In this example, the thermometer B is labeled with two intervals.