Egg Lab We have been learning about how different cell processes are able to help an organism maintain homeostasis. Osmosis is the process by which high concentrations of water travel through the cell membrane to where there is a low concentration of water. Students investigated this process by placing an egg into different solutions. Each day students collected data on the mass of the egg, observed what it looked like, and measured the amount of liquid that was present in the cup. Then they looked at their data to determine if the solutions were hypotonic, hypertonic, or isotonic compared to the egg. With this information students wrote about it making a Claim, giving Evidence, and then summing it up by stating their Reasoning. Hypotonic solutions such as vinegar and tap water caused the egg to swell in size. Hypertonic solutions like corn syrup caused the egg to shrink in size. Microscope Lab During this week of labs students learned how to correctly use microscopes to explore the microscopic world! They observed prepared slides, explored drops of pond water, and created wet mount slides of their choice such as: hair, pimples, snake skin, bugs, rat hair, turtle shell flakes, and other items they were curious to see. Many of them were able to capture videos with their phones of the living creatures in the pond water. It was so cool! | On the last day of testing, each group used a solution of their choice. Solutions tried out: hydrogen peroxide, shaving cream mixed with other fluids, egg yolks, Mountain Dew, vinegar, cooking oil, salt water, and adding in food coloring. Students were excited to see if their hypothesis was correct and to pop the egg to see what it was like inside. Evaluating Specialization Lab In this lab students explored the difference in how unicellular and multicellular organisms function. First they had to independently (unicellular) complete all of the steps to create a paper chain with the alphabet written on each 2" by 12" loop in 5 minutes. Then they worked with a group (multicellular) to organize the jobs needed to complete the task to maximize their efficiency. The competition was fierce as team members frantically worked to assemble their loops to create the longest paper chain and be declared the victor! |
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Shari HudgeonsPaola Middle School Science teacher Archives
December 2020
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