Analyzing Cell Components Lipids are substances that make up cellular membrane. In this activity our sixth graders observed how lipids such as oil interact with water and soap.
Evaluating Specialization In this activity our sixth graders evaluated the advantages of specialization and compared models of unicellular and multi-cellular processes.
Cell Wall in Onion Skin Cells In this activity our sixth graders learned that there are a large number of regularly shaped cells lying side by side and each cell has a distinct cell wall.
Anaerobic Respiration by Yeast In this activity our sixth graders learned that in the absence of oxygen, yeast undergoes anaerobic respiration to produce carbon dioxide, ethanol and energy. They learned that anaerobic respiration is an alternative glucose breakdown process that occurs when normal, oxygen-using (aerobic) cellular respiration is not possible.
Diffusion and Osmosis In this activity our sixth graders used water and food coloring and learned that diffusion is the movement of particles from a region in which they are in higher concentration to regions of lower concentration. And this process is passive since no external energy is needed. They also did cucumber salt experiment and learned that osmosis is a special example of diffusion. It is the diffusion of a substance through a semipermeable membrane from a more dilute solution to a more concentrated solution. This process is also passive.
Surface Area to Volume Ratio In this activity our sixth graders learned that when an object/cell is very small, it has a large surface area to volume ratio, while a large object/ cell has a small surface area to volume ratio.