Bell Ringer 10-21-13Get a new bell ringer sheet!

Today is National Celebration of the Mind Day and also National Reptile Day

Draw a picture of a reptile on your bell ringer sheet

Info/Reminders

Homework is due today!

We will be in the computer lab tomorrow, room 338

Elements, Compounds and

Mixtures

10-21-13

MatterMatter is anything that takes up space and

has mass

Matter is made of atoms and molecules

Chemistry is the study of matter

how it is made (structure) what it is made of (composition) how it reacts (behavior)

So, where are we?What we’ve learned…

Matter can exist in different states: solid, liquid, gas, plasma

Matter can have different properties and undergo changes:

physical, chemical What we’re doing today…Taking a closer look at what matter is made

of (groups of atoms and molecules)

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

But can we observe atoms?

NO!

Today we’ll be using models to examine matter and how it interacts (remember the s- word from last week?)

Part 1: Modeling Atoms

Each group has a set of dishes filled with beads – these are our samples of matter

Each atom is represented by one bead

Each molecule* (groups of atoms bound together) is represented by a group of beads

Molecules and atoms are both particles. So, a single bead and a group of beads are also particles in our model!

Do not open the petri dishes!*change this word in your notes

Part 2: 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.

PURE SUBSTANCES MIXTURES

SORT DISHES INTO TWO GROUPS, PURE SUBSTANCES AND MIXTURES.

Part 3: Pure substances: Elements vs. Compounds

Pure substances can be classified into two sub-categories:

Element: a substance made from one type of atom

Compound: a substance 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 SUBSTANCES

Elements Compounds

SORT THE PURE SUBSTANCES GROUP INTO TWO SUBGROUPS.

Bell RingerClassify as an element, compound, or

mixture1. N2

2. N2 + H2O3. H2O

Make Up Work

Due by Tues 10/29Check folder, locker, house firstBenchmarks not scored yetUnit 2 test on Tues will count for this

quarter – don’t miss itCan’t make up 1st quarter work for 2nd

quarterCan come to 315 today or Friday after

school (first 15 min)

Part 4: 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 its symbol

MIXTURESNON-MIXTURES – PURE

SUBSTANCE

ELEMENT COMPOUND

Part 5: SummaryReflection: Take a minute to think about

something new that you’ve learned today.

Flow chartBased on the work we’ve done today,

create a flow diagram that organizes matter

Must include the words: Matter, element, pure substance, compound and mixture

Example Flow Chart

School

Principals and Vice

Principals

Students Teachers

GirlsBoys

Matter Flow ChartMatter, Elements, Pure Substances,

Mixtures, Compounds

MATTER

PURE SUBSTANCE

MIXTURE

ELEMENT COMPOUND