Warm-upWarm-up1.1. What instrument would you use to measure What instrument would you use to measure

temperature?temperature?

2.2. Which of the following is a unit of volume?Which of the following is a unit of volume?a.a. gram gram b. atmosphereb. atmosphere c. meterc. meter d. literd. liter

3.3. What property of matter can you measure What property of matter can you measure using a graduated cylinder? using a graduated cylinder?

Thermometer

Volume

2-3 Classifying Matter2-3 Classifying MatterClassifyClassify pure substances as elements and pure substances as elements and compounds.compounds.

DescribeDescribe the characteristics of an element and the characteristics of an element and the symbols used to identify elements.the symbols used to identify elements.

DistinguishDistinguish pure substances from mixtures. pure substances from mixtures.

ClassifyClassify mixtures as heterogeneous or mixtures as heterogeneous or homogeneous.homogeneous.

ClassifyClassify mixtures as solutions, suspensions, or mixtures as solutions, suspensions, or colloids.colloids.

Matter?Matter?What is matter?What is matter?– Anything that has mass and takes up spaceAnything that has mass and takes up space

Why do we need to classify matter?Why do we need to classify matter?– Not all matter is the same.Not all matter is the same.– Different types of matter must be treated differently.Different types of matter must be treated differently.

Group the following into 2 or more Group the following into 2 or more groupsgroups

SandSand

ConcreteConcrete

IronIron

Orange juiceOrange juice

PaintPaint

AirAir

paperpaper

BasketballBasketball

CarCar

Monocacy River waterMonocacy River water

Vitamin waterVitamin water

ComputerComputer

Cell phoneCell phone

goldgold

Pure SubstancesPure SubstancesMade up of all the same thing or one Made up of all the same thing or one type of matter.type of matter.

Pure substances have the same Pure substances have the same properties regardless of sample.properties regardless of sample.

Subgroups Subgroups – Elements Elements – compounds.compounds.

ElementsElementsSubstances that cannot be broken down into Substances that cannot be broken down into simpler substances.simpler substances.

Think of atoms. Think of atoms.

Contain only one type of atom.Contain only one type of atom.

It has a fixed composition.It has a fixed composition.

Examples of elements: Examples of elements: – Aluminum (Al), Gold (Au), Carbon (C) - solidsAluminum (Al), Gold (Au), Carbon (C) - solids

– Bromine (BrBromine (Br22), Mercury (Hg) - liquids), Mercury (Hg) - liquids

– Oxygen (OOxygen (O22), Nitrogen (N), Nitrogen (N22) - gases) - gases

CompoundsCompoundsSubstances that are made up of two or more Substances that are made up of two or more simpler substances.simpler substances.– The simpler substances can be either elements or The simpler substances can be either elements or

other compounds.other compounds.– They are combined in chemically defined ratios.They are combined in chemically defined ratios.

– HH22O – WaterO – Water

– CC66HH1212OO66 – Glucose (Sugar) – Glucose (Sugar)

The make-up of mixtures are not fixed.The make-up of mixtures are not fixed.

Properties vary by mixture contents.Properties vary by mixture contents.

They retain some of the properties of They retain some of the properties of the individual substances.the individual substances.– Sand Sand – DirtDirt– Mac & cheeseMac & cheese

MixturesMixtures

Which of the following are pure substances?Which of the following are pure substances?

A.A. SandSand

B.B. Copper wireCopper wire

C.C. Your PhoneYour Phone

D.D. Your notebookYour notebook

Which of the following is a mixture?Which of the following is a mixture?A.A. Pure waterPure water

B.B. 24 karat gold ring24 karat gold ring

C.C. Iron rodIron rod

D.D. River waterRiver water

Which of the following is not an element?Which of the following is not an element?

A.A. GoldGold

B.B. SugarSugar

C.C. IronIron

D.D. ZincZinc

Which of the following is a compound?Which of the following is a compound?A.A. HH22OO

B.B. AuAu

C.C. CuCu

D.D. FeFe

Heterogeneous MixturesHeterogeneous MixturesThe Greek words The Greek words hetero hetero and and genusgenus meaning meaning “different” and “kind.”“different” and “kind.”

Two or more types of atoms, physically Two or more types of atoms, physically combined in no definite ratio.combined in no definite ratio.

Different throughout.Different throughout.

Homogeneous MixturesHomogeneous MixturesTwo or more substances, physically combined Two or more substances, physically combined in no definite ratio.in no definite ratio.

Same throughout.Same throughout.

Matter ClassificationMatter Classification

MatterMatter

Pure SubstancesPure Substances MixturesMixtures

ElementsElements CompoundsCompounds HomogeneousHomogeneous HeterogeneousHeterogeneous