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Classification of Matter Section 2.1

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Classification of Matter Section 2.1

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  1. Focus Activity: Get 1 of each of the colored sheets of colored paper. Put the bright pink on top of the lavender on top of the gold on top of the blue. Shift each paper up so that 1.5 cm of the color is showing. Fold from the top down so that the 2 bright pink parts meet. See Board for Example!! See below for labeling. Classification of Matter Section 2.1 Substance Mixture Element Homogeneous Atom Solution Compound Heterogeneous Molecule Suspension Concept Map Colloid Extra Information

  2. Cut each page in half - Except for the top and bottom blue page Almost to the top staple. Substance Mixture Element Homogeneous Atom Solution Compound Heterogeneous Molecule Suspension Concept Map Colloid

  3. On each half sheet (except Concept Map) write… • Definition 2. Definition • Example 3. Example

  4. On the top flap of EVERY page write… 1. Diagram 1. Diagram

  5. Matter – top page flap • Anything that has mass and takes up space Matter can have many different properties or characteristics. These properties and characteristics are used to classify matter in much the same way that the characteristics of living things are used to classify organisms. Chemistry is the study of the properties of matter and how matter changes.

  6. Substance • Matter that is pure • Has a specific composition (what it’s made of) All particles are the same. • Specific properties • Properties • Physical – characteristic of a pure substance that can be observed without changing it into another substanceExamples of physical properties are: boiling point and freezing point, hardness, texture, color, solubility, phase of matter, flexibility, magnetism, conductivity, etc. • Chemical – characteristic of a pure substance that describes its ability to change into different substancesExamples of chemical properties are flammability and reactivity with other substances.

  7. Take a baggie. Sort the objects in your baggies into 3 groups. Describe the differences between the groups and make a list of characteristics.

  8. Examples of Substances Has specific properties All the Same Has a specific composition.

  9. Elements • Pure substance that can not be broken down into any other substances by chemical or physical means. • Composed of identical atoms.

  10. Atoms • Basic particle from which all elements are made.

  11. Compounds -composed of 2 or more elements in a fixed ratio • properties differ from those of the individual elements • Chemical Bonds hold the elements together • EX: table salt (NaCl)

  12. Molecules • Groups of two or more atomsbound by chemical bonds • Can be two of the same element

  13. Focus Activity: Make a graphic organizer to… • Show the relationships between: • Substances • Atoms • Compounds • Molecules • Elements • Grab a markerboard, marker and sock, place it under your desk for use later in the period. DO NOT DRAW ON THE MARKERBOARD!

  14. Chemical Formula-Extra Info • Shows the compound and the ratio of atoms.

  15. Mixtures • Variable combination of 2 or more pure substances. Each keep individual properties • http://player.discoveryeducation.com/index.cfm?guidAssetId=c44da0f1-32c2-4de1-90e0-89e856fb9518 Heterogeneous – You can see the different Parts Homogeneous – Evenly Mixed Can not see the different Parts

  16. Tyndall Effect (Extra Info) • The scattering of light by particles in a mixture http://www.youtube.com/watch?v=gheuYqQ6phE&feature=related

  17. Mixtures • Suspension • heterogeneous • large particles • Tyndall effect • particles settle • EX: • fresh-squeezed lemonade • Sand in water • http://player.discoveryeducation.com/index.cfm?guidAssetId=60c09eba-09c5-4273-916f-078d37b3f92b

  18. Mixtures • Colloid • heterogeneous • medium-sized particles • Tyndall effect • particles don’t settle • EX: • milk • Clouds • Smoke • mayo

  19. Mixtures • Solution • homogeneous • very small particles • no Tyndall effect • particles don’t settle • EX: • rubbing alcohol (ethyl alcohol and water) • Air (N2 + O2) • http://player.discoveryeducation.com/index.cfm?guidAssetId=eeed02e8-60c2-4bd8-a4f1-ef6c8004a30b

  20. What type of Mixture am I? • Colloid • Suspension • Colloid • Solution • Suspension • mayonnaise • muddy water • fog • saltwater • Italian salad dressing

  21. Concept Map- Fill this in on your foldable MIXTURE PURE SUBSTANCE yes no yes no Is the composition uniform? Can it be chemically decomposed? Colloids Suspensions MATTER yes no Can it be physically separated? Homogeneous Mixture (solution) Heterogeneous Mixture Compound Element

  22. Pure Substances (Extra Info) • Law of Definite Composition • A given compound always contains the same, fixed ratio of elements. Two different compounds, each has a definite composition.

  23. Pure Substances (Extra Info) • Law of Multiple Proportions • Elements can combine in different ratios to form different compounds. • CO CO2

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