Test of Essential Academic Skills (TEAS) ATI Mathematics Practice Test

Approximately how long is the average human eyelash?

1. 1 nanometer

2. 1 centimeter

3. 1 meter

4. 1 kilometer

The correct answer is: 1 centimeter

The average human eyelash is approximately 1 centimeter long. This length is typical for eyelashes, as they can vary slightly among individuals but generally fall within a range that centers around 1 centimeter. Understanding the scale of measurement is critical here. Options like 1 nanometer are far too small; nanometers are used to measure components at a molecular level, such as atoms and small particles, which is not applicable to the size of eyelashes. Similarly, 1 meter is too long for a human eyelash, as that measurement is more suited to objects like a human foot or a small piece of furniture. Finally, 1 kilometer is vastly oversized for any human body part, as it is commonly used to measure much larger distances such as those found in geographical contexts. Therefore, 1 centimeter is the accurate choice for the average length of a human eyelash.