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Unit 2 Review Describing and Classifying Matter

Unit 2 Review Describing and Classifying Matter. Created by the 8 th grade students. Chemical Property. Is a change that forms a new substance. Ex: Eating food, Rusting, Burning, By: Sam, Will, Magali. Physical Property. The substance stays the same, but the appearance is altered.

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Unit 2 Review Describing and Classifying Matter

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  1. Unit 2 ReviewDescribing and Classifying Matter Created by the 8th grade students

  2. Chemical Property Is a change that forms a new substance. Ex: Eating food, Rusting, Burning, By: Sam, Will, Magali

  3. Physical Property • The substance stays the same, but the appearance is altered. • Ex: Melting Breaking, Changing States

  4. Elements, Compounds, and Mixtures By Kelly, Elsa and Rosa

  5. ElementsA pure substance that cannot be broken down further- already in simplest form • Cobalt • Iron • Nickel • Zinc • Nitrogen • Copper • Lead • Sulfur • Boron • Silicon

  6. Nitrogen Boron Cobalt Zinc Sulfur

  7. Compoundspure substance composed of two or more elements that are chemically combine • Table salt- sodium and chlorine • Water- hydrogen and oxygen • Sugar- carbon, hydrogen, and oxygen • Carbon dioxide- carbon and oxygen • Baking soda- sodium, hydrogen, carbon, and oxygen • An unfrosted chocolate cake • Ice cream

  8. Water Carbon Dioxide Baking Soda Unfrosted chocolate cake Ice Cream Sugar Table Salt

  9. MixtureA combination of two or substances that are not chemically combined • Coffee • Soil • Soup • Pizza • Milk • Nail Polish

  10. Pizza Coffee Nail Polish Milk

  11. Element: A pure substance that cannot be separated or broken down into simpler substances by physical or chemical means Compound: A pure substance composed of two or more elements chemically combine

  12. Compounds and Mixtures The difference between compounds and mixtures

  13. The Differences

  14. Solubility

  15. Ability of a substance to dissolve into water • It is a physical change • Makes a solution; a type of mixture • Increases as the temperature of water does • Solute- what is being dissolved; example: sugar • Solvent- does the dissolving; example: water

  16. Scientific Terms Winston S. Andrew S. Hanna T. Lara H.

  17. Heterogeneous • The substance appears different • Cake • Pizza • Soup • Sandwiches • Chocolate Chip cookies

  18. Homogeneous • The substance appears the same through out it • Chocolate ice cream • Milk • Hershey’s Kiss • Mashed potatoes • Water

  19. heterogeneous

  20. Homogeneous and Heterogeneous Same and DIfferent

  21. HomogeneousThe sameBecause they all look the same.

  22. HeterogeneousDifferentBecause the leaves and actual fruit have different appearances.

  23. HeterogeneousDifferent Because it has the meat bun and mustard which is all different.

  24. Homogeneous vs. Heterogeneous By Ariella, Aviva, and Dain

  25. Bread with crust is Heterogeneous! Bread without crust is homogeneous!

  26. Cantaloupe is Heterogeneous because there are seeds, fruit, and skin on the outside.

  27. Chocolate without the wrapper is homogeneous because it is just chocolate!

  28. Raspberries (not in the crate) are heterogeneous.

  29. An egg is heterogeneous. There is the shell, the yolk, and the white.

  30. A peanut butter and jelly sandwich is heterogeneous because it has bread, crust, jelly, and peanut butter. (Ariella likes butter too!)

  31. Thanks for Learning about food!(DO WELL ON THE TEST)

  32. SOLUBILITY SOLUBILITY A presentation brought to you by Chase N. Bowlin

  33. Solubility-the measure of how much of a substance will dissolve in a given volume of water. Solubility is a physical change and is dissolving sugar, salt,ect. In water Also it is- The ability to dissolve in another substance, more specifically, the amount of solute needed to make saturated solution using a given amount of solvent at a certain temperature.

  34. Facts and examples • High solubility: sugar dissolves readily in water • Low solubility: sugar does not dissolve easily in water • Compounds have either high or low solubility • Examples • sugar in water=a very strong solvent depending on how much sugar you put in.

  35. Substances being Soluble • If a substance is soluble it means that that substance has the ability to be dissolved into another substance like salt. • Salt is an example because it can be dissolved into water that is hot.

  36. INSOLUBLE SUSBTANCES OMG!!!!!! • If a substance is INSOLUBLE It means that substance DOES NOT have the ability to be dissolved. • OIL is a great example of an insoluble substance because when oil is pored into a beaker full of water the oil forms clots and floats to the surface thus rendering the substance INSOLUBLE.

  37. Elements, Compounds, Mixtures By: Amanda Bauer and Marianne Galbraith

  38. Compounds Compounds are chemically combined/seperated. Compounds are made of two or more Elements. Different properties from Elements that formed it. Compounds can be identified by physical and chemical properties.

  39. Mixtures Mixtures can be physically seperated. Mixtures keep their original properties. No definite ratio (no exact amount)

  40. Properties of Mixtures Mixtures keep their original properties. Mixtures have no definite amount. You can physically separate them.

  41. Elements Elements are pure substances. Elements can not be seperated by physical or chemical means. Each Element only contains one particle. Elements are in three groups, metals, non metals, and metalloids.

  42. Phase Change By Kelly Krause

  43. Phase Changing • Plateaus because the phase change has to happen • When energy is being added the substance will get hotter • When energy is being taken away the substance will get colder

  44. Condensation Vs Vaporization • Condensation and Vaporization happen at the same time • Vaporization is liquid turning to a gas

  45. Sublimation • Sublimation is a solid turning to a gas • An example is Dry Ice

  46. Freezing, Melting, Boiling and Vaporization • Freezing- Liquid turning into a solid • Melting- Solid turning into a liquid • Vaporization- Liquid turning into a gas • Boiling- Liquid to gas

  47. Examples • Melting- Ice to water • Freezing- Water to ice • Sublimation- Dry ice • Boiling- Liquid to gas

  48. Physical & Chemical properties By: Tim, Otto, Reyna

  49. Physical Properties • Physical properties of matter can be observes or measured without changing the identity of the matter.

  50. Chemical properties Chemical properties describe a substance based on its ability to change into a new substance with different properties.

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