Mixtures January 15 2015 Bell Work 11215 Would
Mixtures January 15, 2015
Bell Work 1/12/15 Would you rather be an element or a compound? Why?
Standard 8. 2. 1. a Essential Learnings: ~ What is a mixture? ~ How does a mixture compare to compounds and elements? ~ What are the types of mixtures?
I. Mixtures A. Mixture- combination of two or more substances that are NOT chemically combined B. No chemical change (each substance keeps identity)
I. Mixtures C. Can separate substances out of mixtures without chemical changes D. Mixtures are not uniform--amounts of different materials can vary
Bell Work 1/15 ★ Draw a picture of your ideal pizza. What ingredients does it have? What does it look like? ★ Share your picture with your partners
II. Solutions (Homogeneous Mixture) A. Solution- mixture that appears to be a single substance a. Evenly distributed materials (same appearance throughout) B. Dissolving- process where particles of substances separate and spread evenly a. b. Solute- the part that dissolves Solvent- what the particles dissolve into
II. Solutions C. Solubility- ability of one substance to dissolve in another at a given temperature and pressure - Why do we say “given temperature and pressure”?
II. Solutions D. Gases are less soluble at higher temperatures E. Different ways to dissolve solids in liquids 1. 2. 3. Increase Temperature Stir/shake the solution Crush the solute Demo
T-I-P-S What would be the result of a lake getting too hot in the summer?
Think About It Why do we shake some things before using them?
III. Suspensions (Heterogeneous Mixture) A. Suspension- mixture where particles are not evenly distributed through solvent a. What are some examples of suspensions? b. what could happen if you didn’t “shake before opening”?
IV. Colloids A. Colloid- mixture that has particles of different sizes but aren’t heavy enough to settle out a. What are some examples of colloids?
Snowball Fight Write down a question on a piece of paper. The question should be challenging (no true/false, yes/no, etc. questions). When the teacher says “go”, students will snowball fight for 30 seconds. At the end of 30 seconds, grab the nearest “snowball” and a partner and discuss your questions
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