Unit 2: Classification of Matter
Opener
 Copy the question and answers
 Which representation is a structural formula?
 A. O
 B. OH
 C. H2O2
 D. H-O-O-H
Review
 Unit Test
 Retake will be Thursday after school
 You MUST sign up for a retake
 Binder check
 Grades are in the gradebook
 Opener sheet
 Grades are in the gradebook
Standards List
 New set of standards and “I can” statements
 This becomes the first page in your new binder list
 Make sure you have a binder
 This is easy points
Unit 2 Pre-Test
 Do your best
 Give as much information as possible
 Graded based on your effort
 Remember we will be using this throughout the unit
 20 minutes
Notes
 Notes today will be on the board
 Make sure to copy those down
 Part of your binder
 Practice Problems at your seat
Opener
 Copy the question and the answers
 What is the chemical formula of calcium cyanide?
 A. CaCN
 B. CaCN2
 C. Ca(CN)2
 D. Ca(CN)3
Review
 Unit Pre-Test
 New unit
Notes
 Matter – anything that takes up space and has mass
 Mass – amount of matter in a substance
 Pure substance – Any substance with definite
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composition and definite properties
Mixture – 2 or more substances physically combined
Element - group of only 1 type of atoms
Compound – 2 or more types of atoms chemically
bonded together
Homogeneous mixture – mixture with uniform
composition throughout
Heterogeneous mixture – mixture with uneven
composition throughout
Practice
 Now let’s practice some classification
 Objects are located throughout the room
 Fill out your chart for each of the objects
 First we will focus on separating between pure substance and
mixture
Mixture – not the same as a compound. Usually
composed of several substances
2 kinds of mixtures
Homework
 On your same classification sheet
 Try to classify each piece of matter as a …
Element
 Compound
 Heterogeneous mixture
 Homogeneous mixture
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Opener
 Copy the question and answers
 What is the correct chemical formula for iron (III)
sulfide?
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A. Fe2S3
B. Fe3S2
C. Fe2(SO4)3
D. Fe3(SO4)2
Review
 Classes of Matter Activity
 Homework Turn In
Card Sort
 On a separate sheet of paper
 In groups of two…
 Place each of the cards into a column
 In column A, you need item #1 and #2
 In column B, you need item #3 and #4
 Write down the items in each column and explain why you
separated the items the way you did
Card Sort Challenge
 Now try to place the items into four columns
 In column A, place item #2
 In column B, place item #6
 In column C, place item #7
 In column D, place item #17
 Again be write down your columns and explain why you
classified them that way
Classwork/Homework
 Complete the packet
 What you do not finish today will be homework