Elements, Compounds and Mixtures 9/15/10 Catalyst Models Classification Activity

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 NO! As scientists, we make decisions based upon what we observe (colors, changes, textures, etc.) But can we see atoms? NO! Today we’ll be using models to examine matter and how it interacts.

Do not open the petri dishes! 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 compound (groups of atoms bound together) is represented by a group of beads Compounds and atoms are both particles. So, single beads and groups of beads are also particles in our model! Do not open the petri dishes!

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.

ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY SORT DISHES INTO TWO GROUPS, MIXTURES AND PURE SUBSTANCES. MIXTURE PURE SUBSTANCE

Part 3: Pure substances: Elements vs. Compounds Pure 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.

ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY SORT PURE SUBSTANCE GROUP INTO TWO SUBGROUPS. NON-MIXTURES – PURE SUBSTANCE Elements Compounds

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 it’s symbol

ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY (Part 3) NON-MIXTURES – PURE SUBSTANCE ELEMENT COMPOUND

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, elements, pure substances, compounds and mixtures

Principals and Vice Principals Example Flow Chart School Principals and Vice Principals Students Teachers Boys Girls

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