Measurements and Uncertainties IBDP Y1

Which of the following best describes what is uncertainty of a measurement?

• it is the exact value of the measurement

• It is how far off the value of the measurement is from its true value.

• It is the precision of a measurement determined by the measuring instrument

• It tells us the minimum value and maximum value of the measurement.

• accurate and precise

• accurate but not precise

• inaccurate but precise

• inaccurate and not precise.

Is it possible to have a measurement made with an instrument that gives a 100% precision?

• Yes

• No

• Maybe

• The measurement has a high uncertainty due to the thermometer's limitations.
• The temperature recorded is within the normal range
• The thermometer has a low uncertainty
• The measurement is accurate and reliable

Which of the following measurement of acceleration due to gravity on the surface of earth will be accurate and precise?

Which of the following is true of the absolute uncertainty?

• It is quoted to the least precise value.

• It is quoted to one significant figure.

• It is always given as a % value.

• 0.74%

• 0.45%

• 0.91%

• 0.99%

In the equation F = ma, the value of F is calculated based on the raw data of m and a. The uncertainty of F is based on the

• % uncertainty of m subtracted from the % uncertainty of a

• % uncertainty of m added to the % uncertainty of a

• % uncertainty of m divided by the % uncertainty of a

• % uncertainty of a divided by the % uncertainty of m

• 14%

• 18%

• 62%

• 66%