Substance Element Compound Solution Colloid Heterogeneous Mixture Suspension Physical Property

1. Welcome to Class today, Sept. 23.Please remember: You’re entering quietly.What was significant about yesterday in the world of SCIENCE?Have your vocab reference sheet out and terms ready.Think you know what a physical property is? Be Ready!

2. Welcome to Class today, Sept. 14.Good job at entering quietly!Please review your mineral characteristics and properties.Do you know the differences?

3. Welcome to Class today, Sept. 14.Good job at entering quietly!Have your vocab ready to study. You may study quietly for 5 to 8 mins.Ready for the words????

4. Vocab Word List Distillation Chemical Property Physical Change Chemical Change Law of Conservation of Mass Tyndall Effect Homogeneous Mixture Substance Element Compound Solution Colloid Heterogeneous Mixture Suspension Physical Property

5. Welcome to Class today, Sept. 15.Good job at entering quietly!Have your homework ready on your desk, but first …..Quietly form 9 groups around the room and have a seat. Ready to go???

6. Welcome to Class! Today is Sept. 11.Good job at entering quietly!Have your Section 2 Notes on your desk and project available to complete soon …..Ready to go???

7. Chapter 18 ~ Notes Classification of Matter

8. Sept. 26: Compare and contrast a compound and mixture. Got examples???

9. I. Composition of MatterA. Review Vocabulary: Property characteristic or essential quality.B. Pure Substances 1. The properties of materials can be used to classifythem into general categories. 2. Every material is made of a pure substance or a mixtureof substances.3. Substance→ an element or compound that cannot be broken down into simpler components and maintain the properties of the original substance.

10. C. Elements 1. All substances are built from atoms.2. If all the atoms in a substance have the same identity, that substance is an element.3. Element→ a substance with atoms that are all alike.4. About how many elements are found on Earth? 90 elements

11. D. Compounds → Substances formed from two or more elements in which the exact combination and proportion of elements is always the same. 1. In water for example, there are 2 atoms of hydrogen and 1 atom of oxygen. Thus, the formula: H2O 2. Compounds look (similar to, different from) the elements in them.

12. E. Molecules → neutral particles that form as a result of electron sharing. 1. Oxygenin the air is a diatomic(two- atom) molecule. 2. A moleculeis a basic unit of a molecularcompound.

13. F. Mixtures → are materials made up of two or more substances that can be easily separated by physical means. 1. Unlike compounds, mixtures(always, do not always) contain the same proportions of the substances that make them up. 2. Example: Pizza

14. G. Heterogeneous Mixtures → a mixture in which different materials are unevenly distributed and are easily identified. 1. Examples: mixed nuts, dry soup mix, granite, concrete,…

15. H. Homogeneous Mixtures → solids, liquids, or gases that contain two or more substances blended evenly throughout. 1. Examples: Soft drinks in sealed bottles, vinegar,… 2. Another name for a homogeneous mixture is a solution. 3. Solution → a homogeneous mixture that remains constantly and uniformly mixed and has particles so small that cannot be seen with a microscope.

16. I. Colloids → a heterogeneous mixture whose particles never settle. 1. Examples: milk, gelatin, paint, fog, smoke,… 2. The word colloidcomes from a Greek word for glue. 3. Can gases and solids contain colloidal particles? Yes 4. A colloid can be distinguished from a solution by its appearance.

17. Sept. 27: Describe in detail the example that Mr. Estep is holding. Is it an atom, compound, mixture, etc. etc. etc.!

18. 5. You can tell if a liquid is a colloid by: passing a beam of light through it.6. A light beam (can, cannot) be seen as it passes through a solution, but (can, cannot) be seen readily as it passes through a colloid.7. This happens because: the particles in the colloid are large enough to scatter light; those in a solution are not.8. Tyndall Effect → the scattering of a light beam as it passes through a colloid.

19. J. Suspension → a heterogeneous mixture containing a liquid in which visible particles settle. 1. Example: muddy pond water

20. 2. Look at Table 1 on page 558, and complete the following chart:Comparing Solutions, Colloids, and Suspensions

21. II. Properties of MatterA. Review Vocabulary: State of Matterone of three physical forms of matter: solid, liquid, or gas.B. Physical Property → any characteristicof a material, such as size or shape, that you can observe or attempt to observe without changing the identity of the material.1. Examples: color, shape, size, density, melting point, and boiling point

22. C. Physical Changes → any change in size, shape, or state of matter in which the identity of the substance remains the same. 1. A substance undergoes a physical change when it boils, freezes, evaporates, sublimes, or condenses. 2. A physical change might involve energy changes, but the kind of substance (does, does not) change. 3. Distillation → a process that can separate two substances in a mixture by evaporating a liquid and recondensing its vapor.

23. D. Chemical Property → any characteristicof a substance that indicates whether it can undergo a certain chemical change.1. Example: Flammable → the tendency of a substance to burn.2. Another example: medicines stored in dark bottles contain chemicals that can change chemically if they are exposed to light.

24. E. Chemical Change → the change of one substance into a new substance.1. Examples: odor, rust on a bumper, heat, cooling, or the formation of bubbles,… 2. In some chemical changes, a rapid release of energy, possibly in the form of heat, light, and/or sound, indicates that a change has occurred.

25. F. Is weathering a chemical change or a physical change? Or both? Both1. A rock splitting due to water freezing and expanding in cracks would be considered a (chemical, physical) change.2. A stream cutting through rock is an example of a (chemical, physical) change.3. Limestone, acid and water reacting to form caves would be considered a (chemical, physical) change.

26. G. The Law of Conservation of Mass → states that the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change.

27. Welcome to Class! It is Sept. 29.Please remember: You’re entering quietly.Have the Properties LEQ Paper out and ready. Have your vocabulary ready too!

28. Welcome to Class! It is Sept. 30. Last Day of September!Take 7 – 10 mins. to study and ask questions. Watch Properties closely. Tests go to the back when complete. Ch. 19 Vocabulary or Molecule Projects.

29. Welcome to Class! It is Oct. 1st.Please remember: You’re entered quietly and should remain that way!Take a small post note from the small desk and draw and label an atom for Carbon. Have your vocabulary ready too!

30. Welcome to Class! It is Oct. 2nd.Please remember: You’re entered quietly and should remain that way!Take your small post note from your notes and draw and label an atom for Aluminum.Again, have your vocabulary ready too!