Assignments Wed. April 18/07

Yesterday in Science we were discussing how aircrafts fall into two categories: those that float and those that fly. Demonstrations and talks began with concepts related to why aircraft such as hot-air balloons and blimps float. We explored how we can make air less dense by heating it up, causing the molecules to expand or move apart. Furthermore, we talked about how gasses, such as helium, are also less dense allowing objects such as helium to float upward.

In relation to why objects fly, we were experimenting with Bernoulli's principles as to how moving air above the wing of an aircraft will create less pressure on it and how the underside with stationary air or not moving air will exert a higher or greater pressure causing lift. Due Thursday, students were to draw labelled diagrams and write explanations, with vocabulary given, on an experiment for each concept taught.

In Math, students continue to explore concepts about geometry. Students were learning about 3D shapes using a variety of nets that they were constructing in class. Another Sir Cumference book was read to also help solidify there understanding. Students were also given practice sheets, due Wed. for review. Rainforest Math is an excellent web site for practicing concepts about geometry. On this site students should explore both the 2D and 3D sections. There are a variety of subsections that they can practice that will also help for them to better understand concepts taught in class. For both science and math students should be taking there books home for review on a regular basis.