measurement example of science
Answers
Methods of Measurement
The length of a piece of string can be measured by comparing the string against a meter stick. The volume of a drop of water may be measured using a graduated cylinder. The mass of a sample may be measured using a scale or balance. The temperature of a fire may be measured using a thermocouple.
Answer:
Explanation:
There are many measurement systems that have been used throughout history and across the world, but progress has been made since the 18th century in setting an international standard. The modern International System of Units (SI) bases all types of physical measurements on seven base units.
Methods of Measurement
》The length of a piece of string can be measured by comparing the string against a meter stick.
》The volume of a drop of water may be measured using a graduated cylinder.
》The mass of a sample may be measured using a scale or balance.
》The temperature of a fire may be measured using a thermocouple.
Comparing Measurements
Measuring the volume of a cup of water with an Erlenmeyer flask will give you a better measurement than trying to gauge its volume by putting it into a bucket, even if both measurements are reported using the same unit (e.g., milliliters). Accuracy matters, so there are criteria that scientists use to compare measurements: type, magnitude, unit, and uncertainty.
The level or type is the methodology used for taking the measurement. Magnitude is the actual numerical value of a measurement (e.g., 45 or 0.237). Unit is the ratio of the number against the standard for the quantity (e.g., gram, candela, micrometer). Uncertainty reflects the systematic and random errors in the measurement. Uncertainty is a description of confidence in the accuracy and precision of a measurement that is typically expressed as an error.