Mar. 2
By the end of this lesson each student should be able to...
• Recall and be able to use equations for area of a circle and pressure.
• Produce force measurement given mass in g or kg
• Determine pressure when provided with measurements for force and area
• Describe the relationship between:
- pressure and force when area stays the same or changes
- pressure and area when force stays the same or changes
- force and area when pressure stays the same or changes
Bell Ringer:
None
Lesson:
1) Discuss test in class. Each student can see their own test. Discuss common errors by students.
2) Identify how to answer "calculation" questions: (a) write formula, (b) substitute values, (c) solve - show division step!, (d) produce answer, (e) in the written work every measurement should have units with it.
3) Introduce "Pressure" unit.
4) Show students difference between directly measured units (like time or length) and derived units, which require a mathematical operation on directly measure units (like density or pressure...)
5) Where pressure is P, then P=F/A
6) Teach students that force must be measured in newtons (N) and 1 N = 100g = 0.1 kg
7) Teach students that area must have squared units like cm^2 or m^2.
8) Provide students with a lump of clay and TOPS pressure lab 1: Squeeze Play. Student complete lab with partner and hand in before end of this period.
9) For question #3 (and #4 - 5) show calculation for Area (instead of using "Area Estimator" as per instructions) AND show pressure calculation
Assignment:
Students collect and take home TOPS pressure lab 2: Pressure Print. Complete lab at home and bring completed to next class. Don't forget to collect the graph paper too or download it here.
