This lesson addresses the following questions ... Have students provide examples of materials that fit each description: Elastic: material that returns to its original shape after being deformed ...

For this lesson, you will need sodium alginate and calcium chloride ... “Synthetic” products are also made from natural resources. For example, the synthetic material plastic is made from petroleum, ...

The pointis stressed that for a good, fair test each material needs to be tested in the same way. A simulation is shown that emphasizes the point that the different properties ofmaterials are good for ...