Shells have great mechanical properties, including high hardness and high toughness. Shells’ great mechanical properties are due to both their nanoscale structure and their combination of inorganic and organic materials.
That an object’s materials and structure determine its strength
That a composite material is a mixture of two or more materials
The difference between toughness and hardness
The differences in mechanical properties between dried glue sheets and plaster bricks
That bleach can remove organic material and baking can harm/degrade organic material
Developed for the NISE Network with funding from the National Science Foundation under Award Numbers 0532536 and 0940143. Any opinions, findings, and conclusions or recommendations expressed in this product are those of the authors and do not necessarily reflect the views of the Foundation.