Bell Ringer Get 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

Matter Matter 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 SUBSTANCESMIXTURES 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 ElementsCompounds SORT THE PURE SUBSTANCES GROUP INTO TWO SUBGROUPS.

Bell Ringer Classify as an element, compound, or mixture 1. N 2 2. N 2 + H 2 O 3. H 2 O

Make Up Work Due by Tues 10/29 Check folder, locker, house first Benchmarks not scored yet Unit 2 test on Tues will count for this quarter – don’t miss it Can’t make up 1 st quarter work for 2 nd quarter Can 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

MIXTURES NON-MIXTURES – PURE SUBSTANCE ELEMENTCOMPOUND

Part 5: Summary Reflection: Take a minute to think about something new that you’ve learned today. Flow chart Based 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 StudentsTeachers Girls Boys

Matter Flow Chart Matter, Elements, Pure Substances, Mixtures, Compounds MATTER PURE SUBSTANCE MIXTURE ELEMENTCOMPOUND