Classification+of+Matter

__**Directions:**__ a) list and define all vocabulary from the chapter b) type at least 4 sample problems with step-by-step directions of how to solve the problem; list the correct answers (if your chapter doesn't have math, there are still problems and concepts we learned.) c) link at least 3 websites for additional resources to help with studying d) develop your own LEQ questions for the section - what did you think were the key points we learned? e) Once your page is done, visit 4 other chapters and answer their LEQ's. (This can be done on a separate piece of paper.)

A.) Vocabulary
-Heterogeneous Mixture- Mixture with one or more visible boundaries between components. -Homogeneous Mixture- Mixture with no visible boundaries because the components are mixed as individual atoms, ions, and molecules. -Solution- A homogeneous mixture. -Mixture- A substance that is composed of multiple other substances, that contain their own properties. -Pure Substance- A sample of matter, either an element or compound, that consists of only one component, with definite chemical and physical properties, and a definite composition. -Element- The simplest principles of a subject of study. Sole substances located on Periodic Table. -Compound- A substance made of a number of elements, created through chemical reactions. Synthesized in fixed ratios. -Exothermic- Characterized by or formed with evolution of heat. -Endothermic- Characterized b or formed with absorption of heat. -Physical Property- A property that can be measured without changing the chemical composition of a substance. -Chemical Property- A property that can be measured with the changing of the chemical composition of a substance. These properties are seen when one substance is reacting with another substance. -Physical Change- A change in which the substance changes physical states, or other physical properties, but does not change its chemical composition. -Chemical Change- A change that creates new substances through chemical reactions between two or more substances. -Colloid-substance that consists of particle dispersed throughout another substance which are too small for resolution, incapable of passing through semipermeable. -Suspension- Solid particles suspended in liquid. -Intensive Property- Properties that do not depend on the amount of substance present. Ex.) color, boiling point, hardness, temperature -Extensive Property- Properties that do depend on the amount of substance present. Ex.) pressure, mass -Evaporation- An operation that uses heat and vacuum to remove a material from a source and deposit it on a surface. The deposition step of an evaporation operation is condensation. -Distillation- The evaporation and subsequent collection of a liquid as a means of purification. -Filtration- Process of passing a liquid or gas, such as air, through a filter in order to remove solid particles. -Chromatography- The technique of separating and analyzing the components of a mixture of liquids or gases by selective absorption. -Charcoal Filtration- Type of filtration using charcoal to remove particles. -Centrifuge- An apparatus consisting essentially of a compartment spun about a central axis to separate contained materials of different specific gravities. -Vaporization- The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole o liquid at its boiling point with no change in temperature and usually expressed as ion kJ/mol. -Condensation- A Chemical reaction in which water or another simple substance is released by the combination of two or more molecules. -Sublimation- The process of changing from a solid to a gas without passing through an intermediate liquid phase. -Deposition- The tendency of something to act in a certain manner under given circumstances, the way it reacts. -Freezing- Changing to a solid from lack of heat. -Melting- Changing to a liquid from the addition of heat.

B.) Sample Problems
1. Is a substance's boiling point a physical property or chemical property? 2. What type of solution is saltwater? 3. How would you separate oil from water in a lab setting? 4. Is iron rusting a chemical or physical change? - 1. Physical Property 2. Homogeneous 3. Centrifuge, then vacuum the oil from the surface 4. Chemical Change

C.) Website Links
-http://www.iun.edu/~cpanhd/C101webnotes/matter-and-energy/properties.html -http://www.ndt-ed.org/EducationResources/CommunityCollege/Materials/Physical_Chemical/PhysicalProperties.htm -http://www.chem4kids.com/files/matter_solution.html -http://www.fossweb.com/modules3-6/MixturesandSolutions/index.html -http://library.thinkquest.org/11430/research/techniques.htm

D.) LEQs
1. How can a substance be determined as a compound, mixture, or element? 2. What are the types of mixtures, and their properties? 3. How can you separate various substances in a lab? 4. How can you tell what is a chemical and physical property, and a chemical and physical change?