Unit 2 Review Describing and Classifying Matter

Unit 2 ReviewDescribing and Classifying MatterCreated by the 8th grade studentsChemical PropertyIs a change that forms a new substance.Ex: Eating food, Rusting, Burning,By: Sam, Will, Magali Physical PropertyThe substance stays the same, but the appearance is altered.Ex: Melting Breaking, Changing States3Elements, Compounds, and MixturesBy Kelly, Elsa and RosaElementsA pure substance that cannot be broken down further- already in simplest form

Cobalt IronNickelZincNitrogenCopperLeadSulfurBoronSilicon

Cobalt

Boron

Sulfur

Zinc

NitrogenCompoundspure substance composed of two or more elements that are chemically combineTable salt- sodium and chlorineWater- hydrogen and oxygenSugar- carbon, hydrogen, and oxygenCarbon dioxide- carbon and oxygenBaking soda- sodium, hydrogen, carbon, and oxygenAn unfrosted chocolate cakeIce cream

Carbon DioxideTable SaltSugarBaking SodaWater

Ice Cream

Unfrosted chocolate cakeMixtureA combination of two or substances that are not chemically combinedCoffeeSoil SoupPizzaMilkNail Polish

Pizza

Coffee

Nail Polish

MilkElement: 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

Compounds and MixturesThe difference between compounds and mixtures

The Differences

SolubilityAbility of a substance to dissolve into waterIt is a physical changeMakes a solution; a type of mixtureIncreases as the temperature of water does

Solute- what is being dissolved; example: sugarSolvent- does the dissolving; example: waterScientific TermsWinston S. Andrew S.Hanna T. Lara H.HeterogeneousThe substance appears differentCakePizzaSoupSandwichesChocolate Chip cookies

HomogeneousThe substance appears the same through out itChocolate ice creamMilkHersheys KissMashed potatoesWater

heterogeneousHomogeneous and HeterogeneousSame and DIfferentHomogeneousThe sameBecause they all look the same.

HeterogeneousDifferentBecause the leaves and actual fruit have different appearances.

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

Homogeneous vs. HeterogeneousBy Ariella, Aviva, and Dain Bread with crust is Heterogeneous! Bread without crust is homogeneous!

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

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

Raspberries (not in the crate) are heterogeneous.

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

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

Thanks for Learning about food!(DO WELL ON THE TEST)SOLUBILITYA presentation brought to you by Chase N. BowlinSOLUBILITY

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.Facts and examplesHigh solubility: sugar dissolves readily in waterLow solubility: sugar does not dissolve easily in waterCompounds have either high or low solubilityExamples sugar in water=a very strong solvent depending on how much sugar you put in.

Substances being SolubleIf 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.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.Elements, Compounds, Mixtures By: Amanda Bauer and Marianne GalbraithCompounds 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. Mixtures Mixtures can be physically seperated. Mixtures keep their original properties. No definite ratio (no exact amount)

Properties of Mixtures Mixtures keep their original properties. Mixtures have no definite amount. You can physically separate them. 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. Phase Change By Kelly KrausePhase 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 Condensation Vs Vaporization Condensation and Vaporization happen at the same time Vaporization is liquid turning to a gas Sublimation Sublimation is a solid turning to a gas An example is Dry Ice 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 Examples Melting- Ice to water Freezing- Water to iceSublimation- Dry ice Boiling- Liquid to gas Physical & Chemical properties By: Tim, Otto, ReynaPhysical PropertiesPhysical properties of matter can be observes or measured without changing the identity of the matter.

Chemical properties

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

Compounds and MixturesBy: MacKenzie Moore and Andi HolmesCompoundsChemically combinedOwn set of propertiesMade of 2 or more substancesDefinite RatiosCan not be physically seperatedNot on the Periodic TableMixturesMade of 2 or more substancesNot on the Periodic TablePhysically combinedCan be physically seperatedNo specific ratios

Compounds vs. MixturesChemically combinedDefinite ratioCan not be physically seperatedNot on periodic tableDo not retain original properties2 or more substancesPhysically combinedNo definite ratioCan be physically seperatedNot on periodic tableRetains their original properties2 or more substancesWhen you add energy, Solids go to liquids (melting)Liquids go to gasses (Vaporization)And sometimes Solids go to gasses. (Sublimation)When you take away energy,Gasses go to liquids. (condensation)Liquids go to Solids. (Freezing)

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

CompoundsChemically combinedTwo or more elements togetherCannot be physically separated The new characteristics are completely different than the original elementsNew set of chemical and physical propertiesNew set of chemical and physical changesDefinite amount of each element Examples of Compounds

MixturesTwo or more substances physically combinedCan be separated by physical means Random amount of elements and compoundsEach substance keeps their own physical and chemical propertiesAll of the substances still have their own physical and chemical changes

Examples of Mixtures

ElementsPure substancesCannot be broken downAre always on the Periodic Table of ElementsWhatever amount of the element there is, the atoms are always the sameUnique chemical and physical properties Unique chemical and physical changesExamples of Elements

Chemical and Physical ChangesCreated By: Uriel & BaleighDefinitions ChangesChemical 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. Definitions PropertiesChemical Property The ability to change a substance from one object to another. Example: Flammability

Physical Property A physical characteristic of an object. An objects appearance.Example: Color