Final answer:
When measuring liquids, you should not hold the measuring cup in your hand, as it can affect the stability and accuracy of the measurement. Instead, use appropriate tools like measuring cups or graduated cylinders and read the measurement at eye level with the measuring device on a stable surface.
Step-by-step explanation:
Correct Practices for Measuring Liquids
When measuring liquids, you should pour off any excess liquids, leaving the amount measured, and check the measurement at eye level on a countertop to ensure accuracy. It is also essential to use the appropriate tools for the type of measurement you are performing—a measuring cup for volume measurements like in cooking, or a graduated cylinder for more precise scientific measurements. However, you should not hold the measuring cup in your hand when measuring, as this can lead to an inaccurate reading due to a lack of stability. Additionally, using a metal spoon for measurement is not recommended when precise measurements are needed, as spoons are not calibrated volume measuring devices.
To correctly measure the volume of liquid in a graduated cylinder, for example, you must make a reading at the bottom of the meniscus. A meniscus is the curve seen at the top of a liquid in response to its container's sides. Many precise liquid measurements are made in milliliters or centiliters, and graduated cylinders are especially well-suited for these small units.