Plasticity Lab Conclusion

Yesterday, we did a lab which not only showed the property of plasticity, but also demonstrated in smaller form of how the mantle works. Firstly, while mixing the two ingredients, corn starch and water. The reason it was so difficult to stir is because the proportion of corn starch and water was unbalanced. Furthermore, the corn starch never really dissolved as the viscosity grew. When you pushed the mixture quickly, the indent was reasonably small, and went away at a rapid speed. However, when the mixture was pushed slowly; the indent was comparatively larger, and took much longer to erase. When rolled into a ball, the mixture tended to break apart easily, however it stayed solid when handled, however, when left alone on the palm of the hand, it melted into a liquid. Moreover, this relates in a smaller form of the properties of the mantle, that with heat and pressure, it stays solid.