Updated again on Wednesday, November 18, 2009

Quiz is this Friday, November 20, 2008

Some students need the following website to complete Separation Techniques #1 to #4

http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/compounds_mixtures/revise9.shtml

Happy to announce I have spent my last day at Outdoor School. Whereas I believe the experience to be invaluable, I look forward to having all my students back at Sykesville so that we can move on to our new unit. In the upcoming unit on Describing Matter. As we move into a a new marking period we will be reorganizing our binders and increasing expectations. A common concern with parents that I am meeting with is how difficult it is for their child to study for the quizzes. I am going to try something different this marking period where I will be give a pretest using the clickers so the students can see how much they don't know. It will also help me focus my classes as I will have the data from their pretest to structure the lessons I am teaching to individual classes.

This is the pretest, the diagrams do not show for questions 16, 17, 18 but students have copies of the pretest with the diagrams on it. This is the website I used with those particular questions.

http://www.correspondence.school.nz/departments/science/chemistry/web/home/chemistry/substances/mixtures.html

Answers are given in red. Now students should take this information and study it. The final quiz will be written with fill in blanks questions a word bank will be provided, true and false questions, where they need to change false statements to true statements, and short answers  questions:

 #1 compare the two different types of mixtures, (homogeneous-cannot see separate parts like tomato soup, peanut butter cookies, and vanilla ice cream, heterogeneous-can easily see separate parts like, New England clam chowder, chocolate chip cookies, and cookies and cream ice cream)

#2 compare compounds to mixtures (compounds are chemically combined in set ratios like NaCl, table salt, H₂O, water, CO₂ Carbon dioxide; mixtures are made by physical means with no set ratios examples would include air, salad, and sea water)

#3 compare elements to compounds (elements are a single type of atoms not chemically combined, examples can be found on Periodic Table of Elements, gold, mercury, oxygen, are examples; compounds are chemically combined in set ratios and called molecules examples are the same as above)

#4 You are given a solution of salt water and iron filings, how can you separate them using some the following separation techniques : Magnetism used to separate things like iron filings from sand; Filtration used to separate sand from water; Chromatography used to separate inks from black markers; Evaporation used to separate solids from liquids without collecting the liquid, and Distillation where you separate liquids from solids or other liquids by boiling and collect the liquid that boils first using coils to cool it down and collect in a separate container. These are the websites I used to discuss this topic:

http://www.harcourtschool.com/activity/mixture/mixture.html

This marking period is going by quickly and if the students do poorly on this quiz they will do poorly on their interim for second marking period. Please help them study for this quiz!!!