3. Mortar Materials
In this lesson the STEMmers are in introduced to our mortar (earth) materials - sand, soil, and clay. Using hand lenses, they closely observed the properties of each material while they were wet and dry. The STEMmers then discussed the following questions with their partners: Which properties do you think will make an adhesive (sticky) mortar? Which material do you think will be easier or harder to use as a mortar?