Wood Shop Lesson 1 Quiz

Match the following

• Distance between 2 points

• Ancient forms of Measurement

• 18 Inches

• Length

• Distance that light travels in time

• Meter

• Hands, Feet, Cubit

• Cubit

–      Error that occurs due to the (a)   in any measurement tool. It can also be an error that is the result of the ​ ​ (b)   in any measurement​ tool.

• inherent uncertainty
• natural variability
• systematic bias
• human error
• instrument calibration issue

True or False: Random errors are difficult to correct, but scientists can use replication to correct them.

• True

• False

Systematic errors occur due to ______

• human error
• improperly reading or recording a measurement

• external factors affecting the experiment
• random fluctuations in data

Based on your notes, and class discussion, which of these choices do you think workers in the trade best use to try to minimize systematic errors.

• Inconsistent measurements, non-standardized procedures, lack of quality control
• Random and inaccurate measurements, ad-hoc procedures, no quality control
• Measure twice and cut once.

• Unreliable measurements, informal procedures, absence of quality control

Precision is a measure of the (a)   of a measurement.  The​ ​ (b)   the variation in experimental results, the better the repeatability.

• repeatability
• smaller
• consistency
• precision

Accuracy is a measure of the (a)   of a body of experimental data to a given known ​ (b)  

• closeness
• value
• precision
• reliability
• validity

When is it ok to estimate length?

• When the exact measurement is not required or when precision is not critical.
• When the exact measurement is always needed
• When precision is crucial
• When accuracy is paramount

How many inches are in a foot?

• 10
• 6
• 15
• 12

How many inches are in a yard?

• 48 inches
• 24 inches
• 36 inches
• 12 inches