1. Matter Properties and Changes

2. Properties of Matter Physical properties: Any characteristic of a material you can observe without changing the identity of the substances in the material Two separate categories of physical properties:

3. Behavior: what it can do –Examples: magnetism, ductility, malleability, thickness, density Appearance: what you can see about it –Examples: color, size, shape, mass, temperature

10. Chemical property: a characteristic of a substance that indicates whether it can undergo a certain chemical change Examples: flammability, reaction to light, how it bonds with other substances

11. Topsail Science Physical and Chemical Properties

12. Classify the following as either chemical property (cp) or a physical property (pp). 1.Red color 2.Density 3.Flammability 4.Solubility 5.Reacts with acid to form hydrogen 6.Supports combustion 7.Bitter taste 8.Melting point 9.Reacts with water to form a gas 10.Reacts with a base to form water 11.Hardness 12.Boiling point 13.Can neutralize a base 14.Luster 15.Odor

13. Classify the following as either chemical property (cp) or a physical property (pp). 1.Red colorPP 2.DensityPP 3.FlammabilityCP 4.SolubilityPP 5.Reacts with acid to form hydrogenCP 6.Supports combustion CP 7.Bitter tastePP 8.Melting pointPP 9.Reacts with water to form a gasCP 10.Reacts with a base to form waterCP 11.HardnessPP 12.Boiling pointPP 13.Can neutralize a base CP 9.LusterPP 10.Odor PP

14. Physical Change ANY change that does NOT change the identity of the material –Examples: ripping in two, growing, freezing, melting, boiling, condensing, demagnetizing, temperature change, etc.

17. A special use of physical change: distillation –Used to separate a liquid from a mixture. –Boiling the liquid will cause it to evaporate –Evaporated liquid is made to condense elsewhere, leaving behind whatever was mixed in it

19. Some clues that a chemical change has occurred: –it produces: Light and/or heat (energy) Any physical change Sound A different smell Bubbles (a gas) or precipitates (a solid) appear

24. the only sure way to test if a chemical change has occurred: a new substance has been produced

25. Mark and Molly Chemical and Physical Changes

26. Classify the following as examples of a physical change (PC), chemical change (CC), or both (B). 1.Sodium hydroxide dissolves water. 2.Hydrochloric acid reacts with sodium hydroxide to produce a salt, water and heat. 3.A pellet of sodium is sliced in two. 4.Water is heated and changed to steam. 5.Potassium chlorate decomposes to potassium chloride and oxygen gas. 6.Iron rusts. 7.Ice melts. 8.Acid on limestone produces carbon dioxide gas. 9.Milk sours. 10.Wood rots.

27. Classify the following as examples of a physical change (PC), chemical change (CC), or both (B). 1.Sodium hydroxide dissolves water. - PC 2.Hydrochloric acid reacts with sodium hydroxide to produce a salt, water and heat. - CC 3.A pellet of sodium is sliced in two. - PC 4.Water is heated and changed to steam. - PC 5.Potassium chlorate decomposes to potassium chloride and oxygen gas. - CC 6.Iron rusts. - CC 7.Ice melts. - PC 8.Acid on limestone produces carbon dioxide gas. - CC 9.Milk sours. - CC 10.Wood rots. - CC

28. The Law of Conservation of Mass: during a chemical change, no matter is created or destroyed, it is only changed. Therefore, the mass of all substances before a chemical change equals the mass of all substances after a chemical change