1. Unit 2: Atoms and Elements
Lesson 3: Classifying Matter

2. Bell work (to be turned in within 10 minutes)
Why did you have a bad report from the sub?
Why did you not do your work?
Why should I let you do the lab tomorrow?
This will be a quiz grade!

3. SC State Standards
7.P.2.A Conceptual Understanding: All substances are composed of one or more elements. Elements are pure substances which contain only one kind of atom. The periodic table organizes these elements based on similar properties. Compounds are substances composed of two or more elements. Chemical formulas can be used to describe compounds.
7.P.2A.3: Analyze and interpret data to describe and classify matter as pure substances (elements or compounds) or mixtures (heterogeneous or homogeneous) based on composition.
7.P.1A.4: Analyze and interpret data from informational texts, observations, measurements, or investigations using a range of methods (such as tabulation, graphing, or statistical analysis) to (1) reveal patterns and construct meaning or (2) support hypotheses, explanations, claims, or designs

4. Objectives (SWBAT)
analyze and interpret data to describe and classify matter as pure substances or mixtures based on composition.

5. Day 1: Matter

6. What is Matter 430 BC Empedocles 1600’s
Proposed that all matter was made of 4 elements, Earth, air, fire, and water
1600’s
Discovered that it was more than 4 elements

7. Elements All matter made from more than 100 different substances
Is a substance that can’t be broken down into anything smaller
Simplest substance
Identified by chemical and physical properties

8. Atoms An atom is the basic particle from which all elements are made
Positively charged nucleus
Surrounded by a negatively charged electron cloud
Made of
Protons and they are positive
Neutrons and they are neutral
Electrons and they are negative
The number of protons give the atom its characteristics

9. Molecules Chemical Bonds
When elements combine with each other
A force of attraction between two atoms
Atoms combine to form larger particles
A molecule is two or more atoms held together by chemical bonds
Example:
H20, CO2, O2, C6H12O6

10. Compounds
Compound
A substance made of two or more elements that are chemically combined in a set ratio
When elements combine they can have very different properties then the parent elements.

11. Contains 12 Hydrogen Atoms Chemical Formula for sugar
Shows the elements in the compound and the ratio of atoms
C6H12O6
Contains 12 Hydrogen Atoms
Carbon
Contains 6 Oxygen Atoms
Contains 6 Carbon Atoms
Chemical Formula for sugar

12. Lesson 3: Matter and Compounds
Day 2: Types of Mixtures
Lesson 3: Matter and Compounds

13. Bell Work What is an atom and what are the three parts of an Atom?
What information can you get from the following Atomic Symbol?

14. Today’s Agenda Bell Work Note on Matter
(4th and 6th Need to make observations)
Matter Worksheet

15. Today’s Objectives (SWBAT)
Analyze and interpret data to describe and classify matter as pure substances or mixtures based on composition.

16. Mixtures Made from two or more substances
Found together at the same place and same time
Each substance keeps its own properties
Two types
Heterogeneous and Homogeneous Mixtures

17. Heterogeneous Mixtures
Easily see the different parts
Can easily be separated
Examples
Salsa, sand, fruit salad, granite, sedimentary rock

18. Homogenous Mixtures Are evenly mixed Can’t be easily separated
Examples:
Sweet tea, ketchup, honey, sea water, oil