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# 1 f 8884_matterand_change

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### 1 f 8884_matterand_change

1. 1. BELLWORKBELLWORK 1.1. What isWhat is matter?matter? 2.2. What is mass and how does itWhat is mass and how does it compare to weight?compare to weight? 3.3. What word is used to describe theWhat word is used to describe the amount of space an object takes up?amount of space an object takes up?
2. 2. Matter and ChangeMatter and Change Unit III Properties of MatterUnit III Properties of Matter
3. 3. 1.1. Anything that takes up space andAnything that takes up space and has mass.has mass. 2.2. Weight is a measure of the pull ofWeight is a measure of the pull of gravity on an object; mass is thegravity on an object; mass is the amount of matter the object contains.amount of matter the object contains. 3.3. Volume.Volume. Matter and ChangeMatter and Change
4. 4.  What states of matter areWhat states of matter are represented in the photograph?represented in the photograph?  What must you do to a substance toWhat must you do to a substance to change it’s physical state?change it’s physical state? Matter and ChangeMatter and Change
5. 5. Matter and ChangeMatter and Change
6. 6. The mass of an object is the amount ofThe mass of an object is the amount of matter the object contains. A golf ballmatter the object contains. A golf ball has a greater mass than a table tennishas a greater mass than a table tennis ball. The golf ball, therefore, containsball. The golf ball, therefore, contains more matter.more matter. Matter and ChangeMatter and Change
7. 7. Matter and ChangeMatter and Change
8. 8. Materials differ in terms of the kind ofMaterials differ in terms of the kind of matter they contain.matter they contain. Table sugar is always 100% sucrose.Table sugar is always 100% sucrose. It always has the same chemicalIt always has the same chemical composition.composition. Matter that has a uniform and definiteMatter that has a uniform and definite composition is called a substance.composition is called a substance. Matter and ChangeMatter and Change
9. 9. Matter and ChangeMatter and Change
10. 10. Substances contain only one kind ofSubstances contain only one kind of matter.matter. Which of these two is a substance?Which of these two is a substance? H20 or Lemonade?H20 or Lemonade? Matter and ChangeMatter and Change
11. 11. All samples of a substance have theAll samples of a substance have the same physical properties.same physical properties. All crystals of sucrose taste sweet andAll crystals of sucrose taste sweet and dissolve completely in water.dissolve completely in water. Matter and ChangeMatter and Change
12. 12. AA physical propertyphysical property is a quality oris a quality or condition of a substance that can becondition of a substance that can be observed or measured withoutobserved or measured without changing the substance’schanging the substance’s composition.composition. Matter and ChangeMatter and Change
13. 13. Examples of physical properties include:Examples of physical properties include: 1.- COLOR1.- COLOR 2.- SOLUBILITY2.- SOLUBILITY 3.- ODOR3.- ODOR 4.- HARDNESS4.- HARDNESS Matter and ChangeMatter and Change
14. 14. 5.- DENSITY5.- DENSITY 6.- MELTING POINT6.- MELTING POINT 7.- BOILING POINT7.- BOILING POINT Matter and ChangeMatter and Change
15. 15. Matter and ChangeMatter and Change Physical properties help chemistsPhysical properties help chemists identify a substance based on theiridentify a substance based on their characteristics.characteristics. Which substance is this?Which substance is this? ““Colorless liquid that boils at 100 ˚CColorless liquid that boils at 100 ˚C and melts at 0 ˚C” ???????and melts at 0 ˚C” ??????? ““Colorless liquid that boils at 78 ˚CColorless liquid that boils at 78 ˚C and melts at -117 ˚C” ???????and melts at -117 ˚C” ???????
16. 16. Matter and ChangeMatter and Change Important properties of the States of MatterImportant properties of the States of Matter PropertyProperty SolidSolid LiquidLiquid Gas or vaporGas or vapor ShapeShape DefiniteDefinite IndefiniteIndefinite IndefiniteIndefinite VolumeVolume DefiniteDefinite DefiniteDefinite IndefiniteIndefinite Expansion onExpansion on heatingheating Very slightVery slight ModerateModerate GreatGreat Compressi-Compressi- bilitybility AlmostAlmost incompre-incompre- ssiblessible AlmostAlmost incompre-incompre- ssiblessible ReadilyReadily compressiblecompressible
17. 17. Matter and ChangeMatter and Change SOLIDSSOLIDS  Coal, sugar, ice and iron.Coal, sugar, ice and iron.  Definite shape and volume.Definite shape and volume.  The shape doesn’t depend on the shape ofThe shape doesn’t depend on the shape of their container.their container.  The particles are packed tightly together,The particles are packed tightly together, they are almost incompressible.they are almost incompressible.  Solids expand only lightly when heatedSolids expand only lightly when heated
18. 18. Matter and ChangeMatter and Change LIQUIDSLIQUIDS  Water, milk and blood.Water, milk and blood.  Takes the shape of their container (flows).Takes the shape of their container (flows).  Particles are packed closely together, butParticles are packed closely together, but not rigidly packed.not rigidly packed.  The volume that a liquid occupies isThe volume that a liquid occupies is always constant, no matter what shape italways constant, no matter what shape it takes.takes.  Almost incompressible, with a tendency toAlmost incompressible, with a tendency to expand when heated.expand when heated.
19. 19. Matter and ChangeMatter and Change GASESGASES  Takes the shape and form of theirTakes the shape and form of their container (flowable).container (flowable).  Particles are spaced far apart.Particles are spaced far apart.  Gases expand without limit to fill anyGases expand without limit to fill any space.space.  Gases are easily compressed.Gases are easily compressed.
20. 20. Matter and ChangeMatter and Change VAPORVAPOR  The gaseous state of a substance that isThe gaseous state of a substance that is generally a liquid or solid at roomgenerally a liquid or solid at room temperature.temperature.  Steam (the gaseous state of matter) isSteam (the gaseous state of matter) is referred to as a vapor because water is areferred to as a vapor because water is a liquid at room temperature.liquid at room temperature.  Moist air contains water vapor.Moist air contains water vapor.
21. 21. Matter and ChangeMatter and Change PHYSICAL CHANGEPHYSICAL CHANGE A type of change that alters a givenA type of change that alters a given material without changing it’s chemicalmaterial without changing it’s chemical composition.composition. Examples include: cutting, grinding,Examples include: cutting, grinding, bending, the melting of the metalbending, the melting of the metal gallium, the freezing of water and thegallium, the freezing of water and the condensation of steam to water.condensation of steam to water.
22. 22. Matter and ChangeMatter and Change PHYSICAL CHANGEPHYSICAL CHANGE Other verbs or actions related toOther verbs or actions related to physical changes include: boil, freeze,physical changes include: boil, freeze, dissolve, melt, condense, break, split,dissolve, melt, condense, break, split, crack, grind, cut, crush and bend.crack, grind, cut, crush and bend.