Course Content Stability and Structures 14 Activities Expand Lesson Content Lesson 01 – What Is a Structure? Lesson 02 – Natural Structures Lesson 04 – Strength and Stability Lesson 05 – Choosing Materials Lesson 08 – Centre of Gravity in Structures Lesson 09 – Tension and Compression Lesson 14 – Pyramids of Ancient Egypt Lesson 03 – Unusual Bird Homes Lesson 13 – The Eiffel Tower Lesson 12 – Covered Bridges Lesson 11 – Condo Buildings and Apartment Buildings Lesson 10 – Building a Roof Lesson 06 – Experiment: Make a Paper Bridge Lesson 07 – Experiment: Centre of Gravity Unit: Stability and Structures