Here are some reports from the teachers of each of our Science classes for last week in the Program. We have organized them by class:
Freshman Science & Sophomore Science (Ms. Keesha Jennings, Instructor)
Freshmen: This week we continued our research to create the perfect catapults. The students learned about kinetic and potential energy to help design a catapult that could succeed in three areas; distance, power, and accuracy. After catapult testing was complete, we focused on Newton’s Laws of Motion. This new focus lead to the creation of balloon powered cars! Designs included ideas about friction, action and reaction, and aerodynamics.
Sophomore: In Science II the students learned about chemical reactions. They discovered how a catalyst can speed up the rate of a reaction, the way energy is released or absorbed in terms of endothermic and exothermic reactions, and the way a closed system can help explain the Law of Conservation of Matter.
Senior Science (Dr. Linda Brannon, Instructor)
During the third week, students planning their own studies had conferences with me to work toward a good design and a feasible plan for data collection. I also encouraged them to find additional background information so that they have some information about similar research related to their topic. (Last week we discussed background sources and how to find them. In addition, I provided students with one background source to get them started; they must find at least two others.) That is, these students pursued the details of turning a good idea into a process of data collection. Students not conducting science studies for their Senior Projects began data collection on the class study, which involved testing in the rat lab. We spend Monday through Friday in the rat lab collecting data from 8 rats in s study that varies the amount of prior exposure the rats had to sucrose reinforcement pellet (4 days vs. 0 days of exposure). The study’s hypothesis is that prior exposure to this flavor will make the rats more willing to work for the same flavored pellets in comparison to pellets of a different flavor. The training boxes measure how many bar presses the rats make, enabling us to make the comparison. Each day, half of the rats work in a Skinner box with banana-flavored reinforcers, while the other half worked in a box that dispenses plain sugar-flavored pellets. Our study seeks to determine if the prior exposure affects the rats’ bar-press responses.