Home School Jules

 Last night I changed the bearings on my skateboard, which lead us to ask some questions about friction and forces. With dad's help, I unscrewed the wheels of the board, popped out the old bearings and replaced them with Reds Precision Skate Bearings. With the new bearings in place, we wanted to see the difference between the two. So we screwed on my brothers old bearings on one wheel to see the difference. The video below shows how much longer the reds bearing last, this is because the reds have less friction and are more spherical in shape.  You can see that the new bearings allow the wheels to continue spinning for longer than the old ones. The wheels all weigh much the same and the axels are all made of much the same materials so this difference in how long they spin for must be mostly down to the differences between the bearings.  Bones Redz bearings are produced to a very high standard of precision in their "sphericity" and are made of a high grade steel that is ver...

 In a science lesson before the half term break, we did a practical lesson using pondweed and a lamp. Unfortunately, we didn't get the results we wanted because it was winter and our lamps were not powerful enough but we found an image that shows what should have happened. However, we had a much more successful experiment that shows how leaves can preserve more water. Pondweed Experiment: The experiment is supposed to show how photosynthesis works with the lamp acting as the sun. The plant in the water is placed in next to the lamp and should make bubbles (oxygen leaving the plant as a result of photosynthesis) and as the lamp is put further away, the amount of bubbles the plant makes should decrease. This photo is from our pondweed experiment where we have one bubble circled in red. We expected a lot more bubbles but at most; only had three. How photosynthesis works is outlined in the following equation: carbon dioxide + water, activated by light energy and chlorophyll = glucose a...