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Warm-Up

Warm-Up. If you have your Syllabus please turn it in to the basket!! Grab 7 note cards and write the letters W-E-L-C-O-M-E on them In what order do the cards have to be stacked in order to spell WELCOME by placing one card down and one card around (repeating until all cards are down).

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Warm-Up

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  1. Warm-Up If you have your Syllabus please turn it in to the basket!! Grab 7 note cards and write the letters W-E-L-C-O-M-E on them In what order do the cards have to be stacked in order to spell WELCOME by placing one card down and one card around (repeating until all cards are down)

  2. Comp book/binder set up

  3. Objective • To be able to differentiate between pure substances and mixtures.

  4. Introduction to Matter • Matter: Any physical substance that has mass and takes up space. • Are you able to see, touch, smell, taste, or otherwise observe matter? • YES!!!

  5. What are the four states of matter? • Define them using your own words!

  6. Think about how the molecules move!

  7. Warm-up • If you have not turned in your syllabus yet, please fill out a late card (excused or unexcused), staple it to your syllabus, and turn it in to the appropriate class bin. • Take out your comp books and answer the following question. • List the four states of matter and explain the properties of each.

  8. Official Definitions Solid- has definite shape and volume Liquid- has fixed volume, takes on the shape of the container (flows). Gas- takes on the shape and volume of it’s container (flows). Plasma- high temperature state where atoms lose most of their electrons.

  9. Plasma in fluorescent tubes

  10. Describing Matter • With your table partner list four ways you can describe a piece of matter. How would you describe an object to a blind person? • Chances are all of the suggestions you’ve just given were all physical properties of matter!

  11. Physical Properties of Matter • Physical Properties: Properties that can be directly observed without causing any change to the matter.

  12. Physical Properties • Size: The length, width, and height of an object. Measured in meters (m) or centimeters (cm). • Mass: How much “stuff” an object is made of. Measured in grams (g) or kilograms (kg).

  13. Physical Properties • Volume: How much space an object takes up. Measured in milliliters (ml) or cubic centimeters (cm3) • Weight: The force of gravity pulling down on the mass of an object. Measured in Newtons (N)

  14. Physical Properties • Color: Wavelength of electromagnetic radiation reflected from the surface of the object. Measured in micrometers (μm) • Texture: The appearance and feel of the surface of an object or substance.

  15. Physical Properties • Hardness: The ability of a substance to resist being scratched. • Shape: The 3-dimensional geometric form of an object. • Odor: Property of matter that is detected by the olfactory system.

  16. Physical Properties • Solubility: Ability of a substance to dissolve in a solvent. • State: Solid, liquid, or gas. • Density: Mass per unit of volume. Measured in grams per milliliter (g/ml) or grams per cubic centimeter (g/cm3).

  17. Types of Matter Diagram! • Pure substances • Elements • Compounds • Mixtures • Homogeneous (solutions) • Heterogeneous

  18. Pure Substances • Every sample has the same properties. • EX: Each pinch of salt tastes equally salty. • Can not be broken down physically.

  19. Types of Pure Substances COMPOUNDS ELEMENTS CANNOT be decomposed into simpler substances by chemical changes On periodic table! Ex: hydrogen, oxygen • CAN be broken into simpler substances by chemical changes. • Always in a definite ratio • Ex: water - H2O, iron(II) sulfate- FeSO4

  20. Practice! Compound Element

  21. Practice! Compound Element

  22. Practice! Compound Element

  23. Practice! Compound Element

  24. Practice! Compound Element

  25. Practice! Compound Element

  26. Practice! Compound Element

  27. Practice! Compound Element

  28. Draw A molecular model! • You can have several molecules together. As long as they are the same, it is a pure substance. NO! YES!

  29. Mixture • Mixture: When two or more pure substances combine, but they don’t chemically bond • Molecules stay separated • They can be physically separated • Filtration, evaporation, distillation, magnetism Ex: Sand, Cereal Think of 2 more!

  30. Draw Mixture Models! Molecular models: • 2 different elements: • 2 different compounds: • A compound and an element:

  31. Types of Mixtures Homogeneous Heterogeneous composed of large piecesthat are easily separated by physical means. Ex: fruit salad, vegetable soup, salsa, etc. • look the same throughoutbut can be separated by physical means (like filtering) Ex: milk, yogurt, Gatorade

  32. Homogeneous Mixtures • Homogeneous mixtures often come in the form of solutions containing two parts. • Solvents: A liquid used to dissolve some substance. • Solutes: The substance that is dissolved in the liquid.

  33. Alloys Mixture of two or more metals… have different properties than either of the metals. Brass- Copper and Zinc Bronze- Copper, tin, aluminum Sterling Silver- Silver and Copper

  34. Practice! Homogeneous Heterogeneous

  35. Practice! Homogeneous Heterogeneous

  36. Practice! Homogeneous Heterogeneous

  37. Practice! Homogeneous Heterogeneous

  38. Practice! Homogeneous Heterogeneous

  39. Practice! Homogeneous Heterogeneous

  40. Practice! Homogeneous Heterogeneous

  41. Practice! Homogeneous Heterogeneous

  42. Lab! • You will be working with a partner on a lab to practice identifying pure substances and mixtures. • Make sure your area is tidy before you do the post lab questions. • Safety is VERY important, do not eat any of the materials. • Turn it in once you have completed each section and checked your work.

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