Monday, December 17, 2007

Foods to Consider for Science Test





Math Test Tomorrow

Math textbook pages 352-353 have been assigned as extra credit for all, but there are a few students who are required to complete this assignment. They should know who they are. The extra credit is due tomorrow before students take their math test.
Students also have a social studies test tomorrow.
The informational literature projects were successfully completed today. The next project is due February 1 and should be a biography. Every student in our class was given a biography poster project to aid in the completion of this project.
In science students made pancakes and looked for evidence of chemical and physical changes. Evidence of a chemical change always includes A new substance being formed and may also include one or more of the following: An odor; Bubbles which indicate a gas has formed; an unexpected Color change; a Different temperature; and Energy in the form of light given off. Chemical changes cannot usually be reversed. The key difference between a chemical change and a physical change is that in a physical change no new substances are produced. On Wednesday's test, students will be asked to identify which foods should be on the menu at The Chemical Change Cafe. The Chemical Change Cafe only serves food which has undergone a chemical change. When analyzing whether or not a food can be placed on The Chemical Change Cafe's menu, students must give evidence to support their ideas. For example, trail mix can not be placed on the menu because it is a mixture and has not gone through a chemical change. Trail mix is not a new substance because it can be sorted into its orginal ingredients. Buttermilk biscuits can be served at The Chemical Change Cafe because they go through a chemical change. Evidence of a chemical change in biscuits includes bubbles formed by gas when the biscuits bake, an odor (aroma) produced by baking, and most importantly, a new substance is formed. Once the biscuits are baked, you cannot remove the individual ingredients used in the biscuit batter so the change is NOT reversible.