Diffusion, Plant Pigment, and Carbon Compound Labs

Diffusion, Plant Pigment, and Carbon Compound Labs

We've certainly been keeping busy this fall in Biology. Here are some snap shots of just a few of our recent labs. Our experiments have been a lot of fun and have given the students the opportunity to apply what they've learned.  Students are learning to work with lab teams, follow detailed procedure and and practice lab skills such as observing, inferring, predicting outcomes, calculating, analyzing data, using models, comparing and contrasting, and drawing conclusions.  

In our Diffusion Lab we looked at how the cell membrane regulates what enters and leaves the cell.  Students tested whether glucose, iodine or sugar could diffuse across a semi-permeable membrane. Through this process they learned how to detect diffusion and to predict how the size of a molecule and concentration affect the process of diffusion

In our Plant Pigment Lab we used paper chromatography to separate photosynthetic pigments (such as chlorophyll a, b & carotenoids) found in spinach, red romaine lettuce and maple leaves.  Students were tasked with determining what type of pigments are found in each leaf type and which combinations provide plants with the biggest photosynthetic advantage.

In our Carbon Compound Lab we used colored gum drops to build organic molecules such as fatty acid chains, ATP, glucose and amino acids.  We explored the properties of each compound and learned about their chemical structure.

We're looking forward to many more enriching lab experiences including our Gordon lab series that begins this month! 

Stay tuned :-)  Mrs. Corbin