Welcome to day 42, Sept 8, 2009

Objectives• SWBAT identify homogeneous and

heterogeneous mixtures • SWBAT Identify elements and compounds

See your new groups and assigned seatsCatalyst

1. What are some things that matter in your life?2. How do you define or describe these things

that matter?

Welcome to Unit 2What does it

f Oh, it matters because….

Chemistry is the

STUDY OF MATTER

Agenda• Catalyst/Who has to take the test• Welcome to Unit 2 - What Does It

Matter?• Lecture• Whiteboards!

• Exit Ticket

TAKING UNIT 1 TEST TODAY DURING LUNCH OR AFTER SCHOOL

• Jahaira

• Jasmine T.

• Joseph

• Omar

• Raul - Tomorrow

TAKING UNIT 1 TEST TODAY DURING LUNCH OR AFTER SCHOOL

• Alba – Tomorrow

• Carl

• Amy-Tomorrow

• Crystal S.

Unit 2: MATTER matters

Matter

Matter – anything that has mass and takes up space

What is MASS?

Mass is a measurement of HOW MUCH STUFF is

in somethingMass is the amount of

matter in an object

Which has a greater mass?

What do we use to measure mass?We use a balance and

measure mass in grams

Triple Beam Balance

Mass is Constant!

•All matter has mass.•The mass of an object is

constant. This means it does not change if it is moved from one place to the next.

•For example, your mass is the same whether you are on Earth or the Moon!

FYI! Mass is NOT Weight!

• Weight is the force produced by gravity acting on mass

• Because gravity can change from one location to another, the weight of an object can change

Takes up space?

All matter has VOLUMEVolume is the amount of space

an object takes up

Which has a smaller volume?

MatterSubstance – matter that has a uniform and definite composition, substances contain only one kind of matter.

Matter

Element or “Pure Element” - substance which cannot be further broken down into other substances. (consists of atoms of only one element – gold (Au), oxygen (O2), Iron (Fe)- This will be anything on the periodic table

Matter

Compound - a chemical substance formed from two or more elements. For example:- Dihydrogen Monoxide (water, H2O)- Carbon dioxide (CO2)- Iron II Sulfate (Fe3SO4)

Matter

Mixture - a blend of two or more kinds of matter.

2 types of mixtures:

Matter

Heterogeneous mixture - no definite composition/properties. (Ex. - salad or pizza)“Easy to separate”

Matter

Homogeneous mixture -have a uniform composition/properties throughout the sample. AKA Solutions. (Ex. - salt water, glass)“hard to separate.”

Matter

Solution - homogeneous mixture – a substance (solutes) dissolves into another substance (solvent). Ex. Salt (solute) dissolving into water (solvent)

Individual Whiteboard

• Identify the following as a heterogeneous, homogeneous mixture, element, or compound.– Raisin Bran– Bronze– Platinum– Pure water– Kool-Aid

Element, compound, heterogeneous mixture or homogeneous mixture?

• Oxygen

Element, compound, heterogeneous mixture or homogeneous mixture?

• H2O

Element, compound, heterogeneous mixture or homogeneous mixture?

• Salt water

Element, compound, heterogeneous mixture or homogeneous mixture?

• NaCl

Element, compound, heterogeneous mixture or homogeneous mixture?

• Jelly and water

Element, compound, heterogeneous mixture or homogeneous mixture?

• Kool-Aid and Water

Element, compound, heterogeneous mixture or homogeneous mixture?

• Peanut butter and Jelly

Element, compound, heterogeneous mixture or homogeneous mixture?

• Salt Water

Element, compound, heterogeneous mixture or homogeneous mixture?

• Oil and water

Matter

Take out a blank sheet of paper with a partner. As a group you will be constructing a concept bubble map of the following terms

- Automobiles example

Matter

Here is an example

Matter

Matter Homogenous

Substance HeterogeneousElement MixtureCompound Solution

Provide examples for: Homogeneous; heterogeneous, element, and compound

Classification of Matter

MATTER

SUBSTANCES: Cannot be broken without

changing its identity

ELEMENT:Simplest form

of matter; cannot be

broken down.

COMPOUND:Substance in

which elementsare chemically

combined.

MIXTURES: Combination of substances in

which the identity of each substance is retained.

Homogeneous Mixture:

Mixture is the same

throughout.

Ex. Carbon,Gold, Sodium

Ex. Water, CO2,sugar

Ex. Gatorade, Air, Steel

Heterogeneous Mixture:

Mixture differs throughout.

Ex. Granite, Vegetable soup

Exit Ticket

(1) Identify the following as an element, compound, homogeneous mixture, heterogeneous mixture.

(a) carbon, (b) Gatorade , (c) water, (d) salad

(2) What is the difference between a compound and a mixture?

(3) What is the definition of matter?