During this lab experiment, we were told to separate a mixture of oil, sand, salt, plastic, water, and some iron filings. We started with the plastic since it was a mechanical mixture it floated because it is less dense than oil and the other particles. We used tongs and picked out the plastic by hand. One of the harder procedures was separating the sand because sand and water don’t mix they are a heterogeneous mixture which means that the sand sinks to the bottom. But when using the strainer, some sand sill fell through the small holes which don’t perfectly work for separating. Instead, we add one more step for filtration which we used the filter paper to get the remainder. The oil was separated using the separation funnel and that was one of the easier procedures because due to density, the oil stays separate from the water so we just needed to wait until the water drop. The salt was one of the longest processes because evaporating the water needed time and so the salt would be the remainder. The water was able to leave the salt behind after the evaporation, because due to heat, water evaporates into steam and salt is a separate molecule than water, therefore they crystallize and stay on the basin.
From the beginning of the year until now, we already finished our first unit for science which is “Credible Scientist”. We did three experiments and wrote lab reports about them to investigate a problem. We need to find out the relationships and evidence interaction between the independent variables and the dependent variables. We learned how to collect reliable and credible data by controlling our controlled variables and doing multiple trials to make sure the data is valid. We need to make sure there aren’t any human-made effect that changes the data. We learned some skills about how to process our data in Microsoft Excel. Also how different graphs trend lines and R square value affect the data. To make our method more complete, we learned to include safety concerns or notes to remind people of possible incidents. There is a document about safety concerns that we can look at when we are doing a lab experiment. I also learned how our experiments and investigation can apply in our daily life. There is a section named ” context/background” in the lab report that we need to write about how it relates to our daily life. I also learned to use the rubric as a reference to complete my lab report. After checking it, I will be able to know what do I need to do to reach a certain grade. At last, we got feedback from the teacher and my classmates to make improvements on the lab report.
Our Activity is FANTASTIC PLASTIC IN FISH IS DRASTIC. It includes a video, a presentation and a quiz about microplastics and the winning team gets a prize! Our three learning goals are to let them understand how microplastic affect people all around the world, human impacts on microplastics and good thing/bad thing about the solution about microplastic. Our topic relates to international mindedness as we should be more aware of how the products we use are affecting people around the world. Things that went well in our activity was that the video could catch the G.4’s attention and they were interested. The quiz also went well as they were active and the questions were on their level. Also, they enjoyed the prize a lot and all of us are happy. Things that I would improve upon if I did it again is that we should be more clear about what ourself should do. We didn’t have a specific job which causes that some of us didn’t have anything to do. Also, we could make the activity more interesting and fun with more interactions between the G.4s and us. Overall, the activity was quite a success.
My final structure
What was the goal?
What? Where? How? Why?
My structure is a locker organiser. It is use for keeping the locker tidy and neat. The structure is the same size as the locker so we put it into the locker to use it. It is separate with cardboards into different size of box so we can put different things in it. We design this structure because it can help us organise our things in locker and keep it tidy.
How did you use science?
What did you learn? What experiments or tests did you design? How did you use the results?
This structure include corrugation layers and beams. After creating it I learned how to use cardboard and cut it correctly. Also, I learned the shape of beam affect the amount of mass put on top and the mass of a beam affect its stability. In my prototype testing, I tested how much mass different shape of beam can hold on top and found the strongest beam to put in the final project. After testing, I found out the shape of beam which is symmetry and equal, the amount of mass it can hold more. This is because when it’s compressed it can let the load spread out evenly around it. Therefore I used the circular beam which could hold the most mass and symmetry no matter which side you see it.
How did you improve as a learner? Think about some of the following: How you identified problems? How you solved them? How you conducted your research? How you managed your time?
I learned how a team work together and listen to other people’s opinion. When we just started making our structure, we discovered there is a hook in the locker which will stop the structure to go in. To solve it, we asked Mr.E for suggestions. At last we cut a whole at the back so the structure can perfectly fit in the locker. I didn’t do any researches because I looked over the experiments that we did before and found a lot of useful things. To manage my time, I do things before the dead line so I can have time to make changes. Also, to keep me on task, I plan on my notebook before starting the project.