Presentation on theme: "Instructional Objective: 1. Explain the properties of matter 2"— Presentation transcript:
1 Instructional Objective: 1. Explain the properties of matter 2 Instructional Objective: 1.Explain the properties of matter 2.Identify elements and compounds. 3.Compare and contrast solutions, colloids and suspensions. 4.Learn how to separate the substance.
4 What is a Pure Substance? Can be an element or a compoundCannot be broken down into simpler componentsAlways maintain the properties of the original substanceEx: helium,aluminum,water and salt
5 Elementssubstance that cannot be chemically broken down into simpler substancesAn element is made up of only one kind of atom.Are 90 elements found in nature.More than 20 other elements have been made in labs.Some elements are unstable and exist only for short time.
6 Elements Examples of Elements: Elements can be found on the periodic tableCarbon (C)Gold (Au)Aluminum (Al)
7 Compoundssubstance made up of two more elements that are chemically combined in a fixed ratioThe properties of a compound are different from the properties of the elements that make it upEx: Water is made of 2 hydrogen and 1 oxygen (both elements are gas)
8 Compounds Examples of Compounds: Made up of more than one element Water (H2O)SugarC12H22O11Table Salt(NaCl)Hydrogen PeroxideH2O2
9 MixturesTwo or more substances that can be separated by physical meansHeterogeneous Mixture: A mixture that has different substances that can be distinguished easilyHomogeneous Mixture: A mixture that has different substances blended together evenly.Water (H2O)andAcetic Acid (CH3CO2H)
11 Instructional Objective: 1 Instructional Objective: 1..Compare and contrast solutions, colloids and suspensions. 2.Learn how to separate the substance.
12 Colloids( come from a Greek word for glue) A homogeneous mixtureIs a type of a mixture that never settlesParticles are larger than those solution but not heavy enough to settleEx: milk , gelatin, paint, fog, smoke etc…
13 How can you detect colloids? By it’s appearance.By passing a beam of light through itThe particles are large enough to scatter lightEx: fog, shampoos, gelatins
14 Tyndall effectThe scattering of light by colloidal particles is called the tyndall effect
15 Solutions, Colloids, and Suspensions Solution: Extremely small particles that will not settle to the bottom of a containerColloid: A mixture that never settles but have larger particles than a solution and whose particles never settle (fog, smoke)Suspensions: A mixture that contains larger particles that will settle to the bottom with time (muddy water, orange juice)
16 What are physical and chemical changes? physical change: change that does not produce new substanceschemical change: change that produces new substances
17 Instructional Objective: 1. Identify the state of matter Instructional Objective: 1.Identify the state of matter. 2Compare the heat of fusion and heat of vaporization
18 Physical ChangesA physical change is a change in size, shape, or state of matter.In a physical change – the material you are changing is the same thing at the beginning and end of the change
19 Properties of MatterPhysical Properties-with out changing the appearanceChemical Properties- always indicate a change
20 Physical Properties.Identifying the content of a substances without changing it.Can identify by their appearances.Ex: shape, color and state of matter.By their behaviorEx: melting point ,freezing point, attraction of the particles etc……
21 Physical Properties. Viscosity (resistance to flow.) Conductivity (ability to allow heat or current to flow)Malleability (ability to be hammered)Melting points (temperature at a substance change from solid to liquid)Boiling points ( temperature at a substance change from liquid to gas)Density (Use to identify a pure substances)
22 Date :1/25/11 Instructional Objective: 1 Date :1/25/11 Instructional Objective: 1. Identify mixtures and learn how to separate them 2.. Learn about chemical change and chemical properties Review Questions: 1.What is a compound ? Other Instructions: Lab :work on Lab 8, Pg# 17 Homework: Do the work sheet(Use your notes)
23 Chemical ChangeA chemical change is a change that changes a material into something newBurning paper (ash, smoke, fire)Sometimes you must rely on cluesBubblesHeat producedChange in colorSmoke
24 raw egg becomes cooked egg raw egg becomes cooked eggcake mix becomes cakepaper becomes ashsteel becomes rust
25 What is a Chemical properties? Is a characteristic of a substance that indicates the chemical changeEx: odor, color change,bubbling,foaming etc…..
26 Chemical Properties Flammability Reactivity Change of color Odor Production of Gas (bubbling)Production of a precipitate (producing solid matter)
27 Separate the substances using their Physical properties: Ex. Size(Size of a poppy seed and sunflower seeds.)Ex: color of the seedEx : attraction of the iron to the magnet
28 Separate the substance using their physical change Distillation:* is process for separating substance in a mixture by evaporating a liquid and recondensing it’s vapor.Ex. Separate the salt from saltwater.
29 Separating colorsChromatography method can be used
30 How can a suspension be separated? filtration: separation of particles in a suspension by passing through the filter paper or some other porous material
31 Separating substances using chemical change Ex: silver tarnish due to the reaction of silver with sulfur compound in the air forming sliver sulfide.Using chemical reaction sulfide can be removed to polish the sliver.
32 Conservation of MassIn any type of change (physical or chemical), the combined mass of the material does not changeThis is called the “Law of Conservation of Mass”Why do ashes have less mass that the wood that was burned?