Question

A1. A. Complete the following web.
Common sources of error
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Answer 1

Explanation:

Common sources of error include instrumental, environmental, procedural, and human. All of these errors can be either random or systematic depending on how they affect the results. Instrumental error happens when the instruments being used are inaccurate, such as a balance that does not work

Answer 2

Answer:

1 passion beside solf

2 eastern