chem standards

ChemStd 12c: Identifying possible reasons for inconsistent results, such as sources of error or uncontrollable conditions.

When we do experiments, we sometimes have good and bad results. This may depend on our skills and experience or uncontrollable elements and errors made during the process.

When performing an experiment, a person may come upon three types of errors:

1. human errors
2. Systematic errors
3. random errors

Human errors are caused due to the experimenter making a mistake while reading the instrustions, reading the instuments wrong, calculating incorrectly, or making an error by spilling or pouring too much of a substance.

Systematic errors are caused by the instruments of the experiment, which may change the data, graphs, and possible outcomes of the entire experiment itself. For example, if we used water in an experiment and had to leave it outside, depending on the day, the water's density might changes and the results can come out differently changing the whole experiment.

random errors occur because they are uncontrollable and they are not consistently accurate. A good example of a random error is timing an experiment with a stop watch or regular watch. since we cannot stop the watch exactly on the time needed. It may vary some of the results.

Uncontrollable conditions include weather and atmospheric temperatures.