New Seating Chart Period 1

Baltazar Nancy

Freddy Johnathan

Yailyn Jamie

Marcos Jan

Marisol Jimmy

Onica Vincent

Romale Tania

Marco

Reynel Joshua

Isadora

Front of Room

Back of Room

New Seating Chart Period 3

Zachary Eric

Giovanni

Vanessa

Andrea Anthony

Adan Cristhian G.

Diego Magdalena

Santiago

Christopher

Rosa Taviona

MarcoJoshua

Edwin Jasmine

Monica Christian R.

Megan

Angelo Francisco

Isabel Wil

Betsy

Manuel Q. Raul

Moises

Katie Ryan

Manuel S.

Front of Room

Back of Room

New Seating Chart Period 6

Wenndy Anayeli

Andy Carla

Yusuf Samuel

Tania Jaime

Kelvin Rigoberto

Gabriela Maria

MayraJacob

MarioJhony

Laura Gustavo

DavidMarlen

Chloe

IvetteRaul

Crystal Sandra

Madeline

Jonathan

Front of Room

Back of Room

New Seating Chart Period 7

Dantrell Keti

Lazaro Junior

Myles Joseph

Christian Ricky

Sandy Arnold

Jovan Rosalie

Angelica Michael

JulioJazmine

JaniGabriel

Angel QJaime

Gustavo

Tianna Martin

James Kendale

Celerina Yvette

Tania Jenny

Luis Jocelyn

Angel J. Juan

Jennyshka Jennifer

Front of Room

Back of Room

New Seating Chart Period 9

JoshuaJose G.

Yasmin Christian

Joanna Kenny

Jose Agustin

Monica Diana

Viviana Miya

Matthew Leslie

Brenda Toriana

Lucas Maria

RicardoOscar

Jose C.

Myeisha Leslie

Marcos Andrez

Ana Jimmy

Jennifer Renato

Zachary Evelyn

Dario Deshaunna

Steven Elizabeth

Front of Room

Back of Room

Elements, Compounds and Mixtures

Activity10/15/09

Matter

The atoms and molecules that make up our surroundings.

Chemistry is the study of matter

We need to be able to describe what it’s made of, how it works and what it looks like!

So, where are we?

What we’ve learned…How to classify matter into

states: solid, liquid, gases. (the big picture)

Where we’re going…Taking a closer look – groups of

atoms and molecules

What we’re doing today

As scientists, we make decisions based upon what we observe (colors, changes, textures, etc.)

Today we’ll be using models to examine matter and how it interacts.

Our modelsEach group has a set of dishes filled

with beadsEach bead represents one atom!Each groups of beads represents a

compound – or a set of atoms bound together.

In groups we are going to complete a few tasks to discover different ways matter can be sorted

Do not open the petri dishes!

Part 1: Pure Substance vs. Mixture

Pure substance: all particles of matter are identical

Mixture: a physical blend of two or more pure substances in any proportion

Your group task: take 4 minutes to sort your petri dishes into two groups: pure substances and mixtures. Write the symbols from the petri dishes onto your worksheet according to how you grouped them.

MIXTURE NON-MIXTURE – PURE SUBSTANCE

ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITYSORT DISHES INTO TWO GROUPS,

MIXTURES AND NON-MIXTURES.

Part 2: Elements vs. CompoundsPure substances can be classified into two sub-

categories:

Element: substances made from one type of atom

Compound: substances made from one or more types of atoms, chemically bound together

Your group task: take 4 minutes to list the pure substances you classified in Part 1, then categorize them into elements and compounds. Once you have sorted them, list the formulas from the petri dishes onto your worksheet in Part 2.

NON-MIXTURES – PURE SUBSTANCE

Elements Compounds

ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY

SORT PURE SUBSTANCE GROUP INTO TWO SUBGROUPS.

Part 3: Elements, Compounds and Mixtures

Group task: Based on the groups you just made, take 5 minutes to fill in the table in Part 3 on your worksheet with drawings of the samples and their formulas.

For example, was classified as a compound, so I would draw it in a box in the compound row of the table and write it’s symbol

MIXTURESNON-MIXTURES – PURE

SUBSTANCE

ELEMENT COMPOUND

ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY (Part 3)

What have we learned?Reflection: Take a minute to think about

something new that you’ve learned today.

Share it with a partner!

Matter can be categorized as a mixture or a pure substance

Pure substances can be further categorized as elements or compounds

But scientists don’t use pictures to describe matter – they use symbols!

Part 4: Describing mixtures and pure substances using codes

Look at the codes you wrote in part 1.

Group task: Take 3 minutes to discuss and answer the following questions on your worksheet in part 4

1. How are the mixture formulas different

from pure substance (non-mixtures) codes?

2. How do the codes relate to the objects in the dishes?

Part 5: Describing elements and compounds using codes

Look at the codes you used to describe pure substances in Part 2

Group task: take 3 minutes to discuss and answer the following questions on your worksheet in Part 5

1. How are the compound codes different from the element codes?

2. How do the codes relate to the objects in the dishes?

Part 6: Rules for writing formulas and codes!

Elements Compounds MixturesGold AuSodium NaCarbon CHydrogen H2

Chlorine Cl2

Silver AgIron FePhosphorus P

Water H2OCarbon dioxide CO2

Sugar C12H22O11

Glass SiO2

Battery acid H2SO4

Salt NaClDrain cleaner NaOH

Salt water NaCl & H2OMilk C6H12O6 & H2O & C50H102O3 Granite SiO2 & AlSi3O3 & K3Si3O10

Look at the list of matter below, and the chemical formulas that chemists use to represent them

Group task: Take 5 minutes to write 4 rules for how chemical formulas are written. Think about• Why are some letters capitalized?• What do the small numbers represent and where are they

located?• What is the difference between the mixture codes and the

pure substance codes?• What information do formulas and codes tell us?