Science 10 - Reviewed homework from the previous day. Students were introduced to multivalent ions. Students were assigned questions 5 - 10 in their textbook for homework and also given a worksheet that will be collected on Monday and marked as an assignment. If students missed todays class they are asked to read section 5.8 focusing on page 195 as it deals with multivalent ions and how they are written in formulas and compound names.   Science 9 - Reviewed homework from the previous day. Students watched a video on living in space which will lead into human space flight later next week. There will be a test next Friday, October 22 on chapters 15 & 16. Reviews will be handed out starting next week. Students were also given an extra credit assignment if they were not happy with their test result. This must be handed in Monday before classes start or it will not count, no exceptions!