Measurements & Measuring Instruments

Measurements & Measuring Instruments

​

DO NOW: Find the volume of the block in m³.

Multiple Choice

What was the volume calculated?

• 10125 m3

• 1.0125 m3

• 450 m3

• 0.010125 m3

The degree of exactness of a measurement. E.g. 8.43 cm is more exact than 8.4 cm.

​Precision

How close a measured value is to a true value.

Accuracy

Accuracy and precision

Some text here about the topic of discussion

Accuracy vs precision

PRECISION AND ACCURACY

Multiple Choice

How close a measurement is to the accepted value is called..

• Accuracy

• Precision

• Significant

• Estimate

Multiple Choice

This bullseye demonstrates...

• High Accuracy & High Precision
• High Accuracy & Low Precision
• Low Accuracy & High Precision
• Low Accuracy & Low Precision

Multiple Choice

Which Student is the most Precise?

• Alex

• Shandra

• Luis

TYPES OF ERRORS

Multiple Choice

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

Multiple Choice

Random errors lead to a lack of:

• accuracy in the measurement.

• significant digits in the measurement.

• precision in the measurement.

• gradation of the measuring instrument

Multiple Choice

What kind of error is Parallax error or the viewing consistently from the wrong angle for all readings?

• Systematic errors

• Random errors

• Both systematic and random errors

• Neither systematic nor random errors

Multiple Choice

Repeated measurements of a quantity can reduce the effects of

• both random errors and systematic errors

• neither random errors nor random errors

• random errors

• systematic errors

Multiple Choice

The graph shown represents the distribution of results of an experiment. These results...

• Were accurate but had a systematic error

• Were precise but had a systematic error

• Were accurate but had a random error

• Were precise but had a random error

Range

Sensitivity is related to precision.

Multiple Choice

Which is more precise?

Analogue vs digital scales

Multiple Choice

Is this an analogue or digital scale?

• Digital

• Analogue

• None

• i have no idea

Linear vs non-linear scales

​For a linear scale, the scale is divided into equal parts.

In a non linear scale the distances between divisions are unequal.

Poll

Linear or non linear?

• Linear

• Non Linear