✓ The students will participate in a class-wide discussion of visible signs of stress on an object and its causes, as well as define the "strength" of an object.
✓ The students will record the definitions of stress, strength, deflection, and point of failure in their notebooks.
✓ The students will view a video clip of a 4-point-bend stress test that was filmed live at a NASA Structures and Materials Research Lab.
✓ The students will review the "Lab Safety Rules" for the classroom prior to beginning the 3-point-bend stress test with their lab partners.
✓ The students will test the strength of 3 small popsicle sticks and 3 large popsicle sticks by measuring the amount of suspended mass that that causes failure and recording the information in their data table.
✓ The students will create a line plot using the class data (compiled by teacher) and analyze the data by responding to a series of prompts.
✓ The students will compute material properties of the popsicle sticks and use them to predict future tests.
✓ The students will draw conclusions and make predictions based on the data.
✓ Using the simulation programs World of Goo and West Point Bridge Builder, the students will learn the basics of bridge design and design a blueprint for a bridge that can withstand a given amount of stress and stay within budget.
✓ The students will construct their bridge according to their design.
✓ Students will evaluate the overall success of their design and application with bridge building after their bridge is put under a strength test by the teacher.