Final answer:
In the U.S., the metric system is used alongside the English units (also known as the imperial system), which includes scales such as degrees Fahrenheit.
Step-by-step explanation:
The metric system is a system of measurement commonly used worldwide and especially in scientific contexts. In the United States, the metric system is used alongside the English units or the imperial system. An example of a scale used within the imperial system is degrees Fahrenheit, which is used to measure temperature, as opposed to degrees Celsius, which is used within the metric system. Additionally, the imperial system includes units such as inches, feet, pounds, and gallons.