Sep 23 – Oct 22 4 weeks
Unit Summary Students will learn how to measure objects using both SI and US units of measurement. Students will learn how important units are to defining measurement and how to convert between unit quantities (eg. feet to inches) as well as use various tools for measurement (rulers, graduated cylinders, dial calipers, etc.). Students will also learn how to use statistics to understand and interpret data.
Big Ideas
Error is unavoidable when measuring physical properties, and a measurement is characterized by the precision and accuracy of the measurement.
Units and quantitative reasoning can guide the solution of problems involving quantities.
Dimensions are included on technical drawings according to accepted practice and an established set of standards so as to convey size and location information about detailed parts and their features.
Statistical analysis of data facilitates understanding and interpretation of numerical data and can be used to inform, justify, and validate a design or process.
Essential Questions
Can statistics be interpreted to justify conflicting viewpoints? Can this affect how we use statistics to inform, justify and validate a problem solution?
Why is error unavoidable when making a measurement?
When recording measurement data, why is the use of significant figures important?
What strategy would you use to teach another student how to use units and quantitative reasoning to solve a problem involving quantities?
What would happen if engineers did not follow accepted dimensioning standards and guidelines but, instead used their own individual dimensioning methods?
When measuring the length of a part, would an inaccurate (but precise) measuring instrument be more or less likely to indicate the actual measurement than an imprecise (but accurate) measuring instrument?
Priority TEKS
Identify general rules for dimensioning on technical drawings used in standard engineering practice.
Distinguish between sample statistics and population statistics and know appropriate applications of each
Distinguish between precision and accuracy of measurement.
Measure linear distances (including length, inside diameter, and hole depth) with accuracy using a scale, ruler, or dial caliper and report the measurement using an appropriate level of precision.
Convert between and within different units of measurement system including the SI and US Customary
Dimension orthographic projections of simple objects or parts according to a set of dimensioning standards and accepted practices
Calculate statistics related to central tendency including mean, median, and mode.
Calculate statistics related to variation of data including (sample and population) standard deviation and range.
Represent data with plots on the real number line (e.g., dot plots, histograms, and box plots).
Activities
Linear measure HW
Linear measure practice paper based
Unit Conversions Homework
Dimensioning Guided Notes
Dimensioning Homework
Statistics Guided Notes
Statistics Homework
Precision & Accuracy Guided Notesc
Precision & Accuracy Activity
Precision and accuracy HW
Design Challenge
Assessment 2