IGCSE - Uncertainties review

What is the temperature change and uncertainty?

• 7.8 +/- 0.2

• 7.8 +/- 0.1

5.65 +/- (a)  

What is the Uncertainty on this measurement?

• 0.1

• 0.05

• 0.5

• 1

What is the length of this wooden stick?

• 4.5 +/- 0.05

• 4.54 +/- 0.05

• 4.55 +/- 0.05

• 4.5 +/-0.1

What is the uncertainty on this balance?

• +/- 0.005

• +/- 0.001

• +/- 0.0005

• +/- 0.0001

What type of error is present with these results?

• Random

• Systematic

What type of error is present here?

(a)  

What is the percentage uncertainty on the measured volume?

• 0.54%

• 0.05cm³

• 1.08%

• 0.1cm³

How close a measurement is to the true value

• accuracy 
• precision

How close a set of measurements is to one another, regardless of whether the measurements are correct.

• accuracy 
• precision