The time is recorded from three different clocks as indicated below. the “true” time is exactly 8: 30 a.m.
which of the three clocks is the most precise?
which clock is the most accurate?
which clock(s) show a systematic error?

measurement clock a clock b clock c
1 8: 25.20 am 8: 29 am 8: 36 am
2 8: 25.00 am 8: 31 am 8: 36 am
3 8: 25.10 am 8: 30 am 8: 36 am

Precision is the stability of the results of each clock so Clock C is the most precise.
Accuracy is the closeness to the actual value so Clock B is the most accurate.
There is a systematic error if the accuracy cannot be fixed but the precision can be increased by increasing the number of times the measurement is taken so Clock C has a systematic error.

Desublimation

Explanation:

The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.

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