On Friday 30th and Saturday 31st March, the Senior School Science Department organized and hosted its second Science Investigation Fair, and Excellence Exhibition. Grade levels across the Senior School division showcased their excellent work from IBDP Science Internal Investigations and Extended Essays in Grade 12 to multimedia projects in Grade 7.
We were especially excited to showcase the second SSIS Science Investigation Fair in Grade 8. For months, grade 8 students have been fine-tuning their research questions and developing their experimental method as they investigated a topic of their choice in more depth.
All participants planned their experiment, carried it out safely, analyzed their data, made appropriate conclusions and evaluated their investigations. This opportunity for students to choose the focus of their science investigation and take learning out of the classroom environment should help the students to make links between science and real world phenomena.
We were extremely excited to see our students display their Science Investigations and were astounded by the quality!
The Senior School students and science teachers will vote for the best investigations. The winners will be announced and bronze, silver and gold level prizes will be presented in a future Senior School Assembly.
Well done to all students that displayed their work at the Excellence Exhibition and especially to the grade 8 students that created outstanding Science Investigations.
We are already planning and looking forward to next years event.
The grade 9 biologists have started studying the final grade 9 biology topic on ecosystems and human influences. To model the flow of energy through food chains we roleplayed the transfer of water (energy) from a large bowl (the sun) to a number of cups with holes in them (trophic levels) to find out how much water (energy) passed to the end of the chain. We then evaluated how the roleplay was similar to. energy loss (loss of water) through food chains and how it could be improved (including the role of decomposers). The students left the lesson with a better understanding of the fundamental concept of how not all energy is passed on to the next trophic level and hence why there is a limit to the maximum number of trophic levels in a food chain.
The grade 11 HL students have been studying the role of the kidney in osmoregulation. In this lesson we discussed the role of antidiretic hormone (ADH) in fine tuning the final volume and concentration of the urine. We also looked at a number of urine samples and tried to match them to potential diseases ( diabetes, kidney damage) and states of hydration.
In IBDP Biology the students have to be able to plan experiments that measure the rate of photosynthesis.The students cut leaf discs from a plant and transferred them to a syringe filled with water. Once all the air was removed the leaf discs sunk to the bottom of the syringe. As the leaf discs carried out photosynthesis, they produced oxygen that moves into the air spsces surrounding the spongy mesophyll. The leaf discs will then rise as oxygen is produced. By measuring how long it takes for the leaf discs to rise; the rate of photosynthesis can be measured.
This week in coordinated science, we used every day lab apparatus to model the digestive process. The apparatus above was used to show the journey of an unbalanced breakfast of crisps, peanuts, bread, milk and coffee. Can you match the apparatus with part of the alimentary canal in this photo? Cam you spot the end product of digestion after egestion from the anus?
This week in Coordinated Science (Biology) we are approaching the end of our first unit on cells, cell processes and animal digestion. To model how our digestive system works we used every day household objects to show what happens in each region of the alimentary canal. The students took on the roles of the teeth using pestle and mortar to crush food), the oesophagus (pushing food along a tube to show peristalsis), the stomach (churning food in a plastic ziplock bag), and the intestines (modelling absorption of food through woman’s tights and the absorption of water with paper towels). They enjoyed witnessing for themselves the final product of the model digestive system!
I hope you enjoyed the dissection today and I’m impressed that none of you had to leave the lab at any point!
Go to this website to investigate the factors which effect photosynthesis
I hope you found today’s first new Double Helix Club memorable even if it didn’t go as planned. We will complete the dissection at a later date.
To do an virtual frog dissection, check here http://www.surgery-games.org/43/Dissect-a-Frog.html
To find out more about frogs and frog dissections, check this glog http://tehescmarts.edu.glogster.com/frog-dissection/