Which of the following best describes the SI unit 'meter', and which objects are approximately one meter in length?

• A. A meter is the SI unit of length, and a guitar and a baseball bat are each about one meter long.
• B. A meter is the SI unit of temperature, and a refrigerator and a microwave oven are each about one meter long.
• C. A meter is the SI unit of time, and a pencil and a paperclip are each about one meter long.
• D. A meter is the SI unit of mass, and a soccer ball and a textbook are each about one meter long.

Answer: (A)

Verified step by step guidance

1. Understand that the SI unit 'meter' is a fundamental unit used to measure length or distance.
2. Recall the definitions of other SI units: temperature is measured in kelvin (K), time in seconds (s), and mass in kilograms (kg).
3. Identify objects that are approximately one meter long by comparing common items to the length scale of one meter.
4. Recognize that items like a guitar and a baseball bat are close to one meter in length, while objects like a refrigerator or a pencil are not typically about one meter long.
5. Conclude that the correct description is that a meter is the SI unit of length, and objects such as a guitar and a baseball bat are each about one meter long.