1. Unit 2 Review Describing 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. Elements A 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. Compounds pure 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. Mixture A 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 Physically combined
Mixtures
Physically combined
Physically or mechanically separated
Keeps original properties
Either homogenous or heterogeneous
Compounds
Chemically combined
Chemically separated
Does not always keep original properties
When 2 or more atoms bond in a chemical reaction
Homogenous

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. Winston S. Andrew S. Hanna T. Lara H.
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. Homogeneous The same Because they all look the same.

22. Heterogeneous Different Because the leaves and actual fruit have different appearances.

23. Heterogeneous Different 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. A presentation brought to you by Chase N. Bowlin
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.

51. Compounds and Mixtures
By: MacKenzie Moore and Andi Holmes

52. Compounds Chemically combined Own set of properties
Made of 2 or more substances
Definite Ratios
Can not be physically seperated
Not on the Periodic Table

53. Mixtures Made of 2 or more substances Not on the Periodic Table
Physically combined
Can be physically seperated
No specific ratios

54. Compounds vs. Mixtures Chemically combined Definite ratio
Can not be physically seperated
Not on periodic table
Do not retain original properties
2 or more substances
Physically combined
No definite ratio
Can be physically seperated
Not on periodic table
Retains their original properties
2 or more substances

55. When you add energy, Solid’s go to liquids (melting)
Liquid’s go to gasses (Vaporization)
And sometimes Solid’s go to gasses. (Sublimation)

56. When you take away energy,
Gasses go to liquids. (condensation)
Liquids go to Solids. (Freezing)

57. Knifty Facks
All states of matter must change states before temperature rises.
ALL CHANGES ARE PHYSICAL!
NOT CHEMICAL! GET THAT STRAIT!!!

58. Compounds Chemically combined Two or more elements together
Cannot be physically separated
The new characteristics are completely different than the original elements
New set of chemical and physical properties
New set of chemical and physical changes
Definite amount of each element

59. Examples of Compounds

60. Mixtures Two or more substances physically combined
Can be separated by physical means
Random amount of elements and compounds
Each substance keeps their own physical and chemical properties
All of the substances still have their own physical and chemical changes

61. Examples of Mixtures

62. Elements Pure substances Cannot be broken down
Are always on the Periodic Table of Elements
Whatever amount of the element there is, the atoms are always the same
Unique chemical and physical properties
Unique chemical and physical changes

63. Examples of Elements

64. Chemical and Physical Changes
Created By: Uriel & Baleigh

65. Definitions – Changes
Chemical Change – A chemical change is when an object turns into something new.
Example: Burning an object to change it into something new.
Physical Change – Changing the way a substance looks.
Example: Changing the color of an object.

66. Definitions – Properties
Chemical Property – The ability to change a substance from one object to another.
Example: Flammability
Physical Property – A physical characteristic of an object. An object’s appearance.
Example: Color