Final answer:
Erratic error and zero error are two different types of errors in measurements. Erratic error is a random error caused by unpredictable factors, while zero error is a systematic error due to a misalignment of the measuring instrument. They can be reduced by different methods.
Step-by-step explanation:
The difference between erratic error and zero error lies in their causes and effects in measurements.
Erratic error is a type of random error that occurs due to unpredictable factors, causing variations in measured values from one observation to another. It can be reduced by taking multiple measurements and calculating the average to minimize its impact.
Zero error is a systematic error that arises when the measuring instrument does not start from zero. It can be reduced by calibrating the instrument properly and accounting for the zero offset in the measurements.