Unit 2 ReviewDescribing and Classifying

MatterCreated by the 8th grade students

Chemical PropertyIs a change that forms a new substance.

Ex: Eating food, Rusting, Burning,By: Sam, Will, Magali

Physical Property

• The substance stays the same, but the appearance is altered.

• Ex: Melting Breaking, Changing States

Elements, Compounds, and Mixtures

By Kelly, Elsa and Rosa

ElementsA pure substance that cannot be broken down further- already in simplest form

• Cobalt • Iron• Nickel• Zinc• Nitrogen• Copper• Lead• Sulfur• Boron• Silicon

Cobalt

Boron

Sulfur

Zinc

Nitrogen

Compoundspure 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

Carbon Dioxide

Table SaltSugar

Baking SodaWater

Ice CreamUnfrosted chocolate cake

MixtureA combination of two or substances that are not chemically combined

• Coffee• Soil • Soup• Pizza• Milk• Nail Polish

Pizza

Coffee

Nail PolishMilk

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

Compounds and Mixtures

The difference between compounds and mixtures

The Differences

Solubility

• 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

Scientific TermsWinston S. Andrew S.

Hanna T. Lara H.

Heterogeneous

• The substance appears different

• Cake

• Pizza

• Soup

• Sandwiches

• Chocolate Chip cookies

HomogeneousThe substance appears the same through out it

Chocolate ice cream

Milk

Hershey’s Kiss

Mashed potatoes

Water

heterogeneous

Homogeneous and Heterogeneous

Same and DIfferent

HomogeneousThe same

Because they all look the same.

HeterogeneousDifferent

Because the leaves and actual fruit have different appearances.

HeterogeneousDifferent Because it has the meat bun and mustard

which is all different.

Homogeneous vs.

Heterogeneous

By 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. Bowlin

SOLUBILITY

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 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.

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.

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 Galbraith

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.

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 Krause

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

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 ice• Sublimation- Dry ice • Boiling- Liquid to gas

Physical & Chemical properties

By: Tim, Otto, Reyna

Physical Properties

• Physical 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 Mixtures

By: MacKenzie Moore and Andi Holmes

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

Mixtures

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

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

When you add energy,

Solid’s go to liquids (melting) Liquid’s go to gasses (Vaporization) And sometimes Solid’s go to gasses.

(Sublimation)

When you take away energy,

Gasses go to liquids. (condensation) Liquids go to Solids. (Freezing)

Knifty Facks

All states of matter must change states before temperature rises.

ALL CHANGES ARE PHYSICAL! NOT CHEMICAL! GET THAT STRAIT!!!

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

Examples of Compounds

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

Examples of Mixtures

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

Examples of Elements

Chemical and Physical Changes

Created By: Uriel & Baleigh

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.

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