In tech, we have worked on elasticity and ductility. Elasticity means a material is stretchy, like taffy. If a material is ductile then it will stretch, but keep its strength. Some materials are also brittle, which means that it will break or snap instead of stretch. Diamond, wood, or cool glass is brittle. Steel and Hot glass are elastic, and copper and aluminum are ductile. These are just some things. To measure how much a material will stretch, people put a chart next to what they’re stretching and draw lines on the material to measure how much it stretched. I am having a lot of fun with this subject and am excited to keep going.