Grade 8s have done a wonderful job on their Elements project using either Prezi or Glogster to create power points, webs, and posters. The most difficult part for students was researching to see if their element formed organic compounds such as hydrocarbons and polymers. 8A is finished but 8B will finish up presentations on Tuesday. This week we will explore various chemical reactions and their reactants and products. Students will do a lab with endothermic and exothermic reactions. We will learn about a very important principle: The Law of Conservation of Mass: all mass is conserved in reactions, but might take on a different form, or a different volume. On Friday we will revisit ionic and covalent bonds.
Homework for the week:
Monday night: three examples of physical change and three examples of chemical change
Tuesday night: 8A (possibly 8B depending on time): Give five chemical formulas of your own showing reactants and products. Use the periodic table to combine metals and nonmetals, for a combination of 8 valence electrons in the outer shell.
Ex) Na + Cl --> NaCl Na and Cl are reactants and NaCl is the product.
Wednesday night: Pg. 295 Review #1-4, Reflect #2, 3 (Class 8B will need to read Chapter 10 on reactants, products, exothermic and endothermic reactions, and the Law of Conservation of Mass because they are missing Science class to receive peer tutoring in Math this time only.)
Thursday night: Study guide: chemical reaction to bond: definition and example of each. Use the textbook and internet to find examples.
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