Types of Errors

A balance has a reading of 0.01g but nothing is being weighed, this is a a ......... error?

• random

• parallax

• zero

• mistake

2 students are measuring volume from different sides of a measuring cylinder, they get different readings. This is an example of a/an ................... error

• random

• parallax

• zero

• reading

A metal ruler is used on a hot day and has expanded. The readings taken on this day are all incorrect. This is an example of a/an ........ error

• random

• instrument

• human reflex

• zero

Students are timing how long their friends take to run 100m to practice for Athletics. 3 people time the same race and all get a different time for the winner, this is an example of a/an ............... error.

• reading

• instrument

• human reflex

• zero

Choose TWO correct ways to overcome systematic errors and random errors

• Use inaccurate measuring instrument

• Take average reading from a few reading of measurement

• Repeat measurement using different measuring tools

• Eye level must be below the measurement scale

Choose TWO correct examples of systematic errors.

• Inaccurate measuring instrument

• Parallax error

• Observer's eye not perpendicular to scale reading

• Zero error

Choose TWO examples of error caused by observer when taking measurement.

• Zero error

• Wrong techniques

• Parallax error

• Measuring instruments error

Which of the following choices is the correct order of steps in the scientific method?

• Hypothesize - draw conclusions - experiment - analyze data

• Analyze data - hypothesize - experiment - draw conclusions

• Hypothesize - experiment - analyze data - draw conclusions

• Hypothesize - analyze data - draw conclusions - experiment

Why should experiments be repeated at least 3 times?

• to show validity

• to increase reliability

• to show other people your results

• because it's fun to do Science experiments

Systematic errors lead to a lack of:

• accuracy in the measurement.

• significant digits in the measurement.

• precision in the measurement.

• gradation of the measuring instrument