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Warm-UpAugust 15, 2013 1. Have name card on desk. 2. Have textbook, binder/notebook, calculator, and signed portion of letter on desk. 3. What is chemistry?

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Presentation on theme: "Warm-UpAugust 15, 2013 1. Have name card on desk. 2. Have textbook, binder/notebook, calculator, and signed portion of letter on desk. 3. What is chemistry?"— Presentation transcript:

1 Warm-UpAugust 15, 2013 1. Have name card on desk. 2. Have textbook, binder/notebook, calculator, and signed portion of letter on desk. 3. What is chemistry? 4. How have you encountered/experienced chemistry today? 5. What are the major parts of the scientific method? 6. Write two examples of a qualitative observation, and two examples for a quantitative observation. 7. The two main types of products from the scientific method are _____ and ______.

2 Warm-UpAugust 16, 2013 1. Have name card on desk. 2. Have textbook, binder/notebook, calculator, and signed portion of letter on desk. 3. What is chemistry? 4. How have you encountered/experienced chemistry today? 5. What are the major parts of the scientific method? 6. If a stack of 7 quarters is 1 inch high, how many dollars are in a stack that is 8 feet tall? 7. An average tree makes 2 x 10 5 toothpicks. Toothpicks are packaged 50 in a box. Each package costs 0.59. How much will it cost in dollars to buy all the toothpicks from 1 average tree? 8. 2 +3(x+5) -7 = 327. What is x?

3 AgendaAugust 16, 2013 - Review scientific method and demonstration - Practice identifying different aspects of the scientific method. - Describing Matter: States and Changes - Classifying Matter - Brief History of Chemistry - The Atom HOMEWORK - Read pgs 4-9 - Section Review pg 9: 2-13 do NOT need to write questions, only answers. - Bring a Ziploc bag with cereal. Take a picture of the nutritional facts.

4 Warm-UpAugust 19, 2013 1. Have name card on desk. 2. If you did not have a calculator last week, check in with me at the front. 3. Boron is a good conductor of electricity at high temperatures. What sort of observation is this? 4. Oppositely charged particles attract each other. Is this a law, theory, a hypothesis, an observation? 5. Which state has a definite volume, but no definite shape? Explain why by discussing about atoms and the attractive forces. 6. What are some evidence of a chemical change?

5 AgendaAugust 19, 2013 - Review changes of matter and demonstration - Go over homework and workbook assignment - Activity on classifying matter - Classifying Matter - Brief History of Chemistry - The Atom HOMEWORK - Read pgs 21-28 - Section Review pg 28: 1,3-9, 11,13 do NOT need to write questions, only answers.

6 Warm-UpAugust 20, 2013 1. Have name card on desk. 2. If you did not have a calculator last week, check in with me at the front. 3. Boron is a good conductor of electricity at high temperatures. What sort of observation is this? 4. Oppositely charged particles attract each other. Is this a law, theory, a hypothesis, an observation? 5. Which state has a definite volume, but no definite shape? Explain why by discussing about atoms and the attractive forces. 6. What are some evidence of a chemical change?

7 AgendaAugust 20, 2013 - Review changes of matter and demonstration - Go over homework and workbook assignment - Activity on classifying matter - Classifying Matter - Brief History of Chemistry - The Atom HOMEWORK - Read pgs 21-28 - Section Review pg 28: 1,3-9, 11,13 do NOT need to write questions, only answers.

8 Warm-UpAugust 21, 2013 1. If you did not have a calculator last week, check in with me at the front. 2. Classify the following as either matter, not matter, or not sure: peanut butter, water, fish, light, garbage, time, motion, the human brain, a feeling, carbon dioxide, air, yourself, an idea, tree, energy. 3. Classify as either a physical or a chemical change: squeezing oranges to make orange juice; an iron nail rusting; adding sugar to iced tea; making popcorn; lighting a match. 4. Classify if the following has a homogeneous or a heterogeneous distribution: water with ice; chicken noodle soup; a bowl of lucky charms; a supreme pizza; water with food coloring; a bag of skittles; a bar of chocolate

9 AgendaAugust 21, 2013 - Prep for Cereal Activity - Review Classification Activity and lecture. - Properties of Matter - Describing Matter using numbers - Significant Figures - Wrap up Chapter 1 HOMEWORK - Read pgs 10-19 - Section Review pg 28: 1,3-9, 11,13 do NOT need to write questions, only answers.

10 QUIZAugust 21, 2013 1. What is a pure substance that is made of only one kind of atom? 2. What is a pure substance that is made up of more than one kind of element? 3. A mixture is a combination of two or more substances/ingredients that are [CHEMICALLY, PHYSICALLY] combined.

11 Warm-UpAugust 22, 2013 1. If you did not have a calculator last week, check in with me at the front. 2. Classify the following as either matter, not matter, or not sure: peanut butter, water, fish, light, garbage, time, motion, the human brain, a feeling, carbon dioxide, air, yourself, an idea, tree, energy. 3. Classify as either a physical or a chemical change: squeezing oranges to make orange juice; an iron nail rusting; adding sugar to iced tea; making popcorn; lighting a match. 4. Classify if the following has a homogeneous or a heterogeneous distribution: water with ice; chicken noodle soup; a bowl of lucky charms; a supreme pizza; water with food coloring; a bag of skittles; a bar of chocolate

12 Warm-UpAugust 22, 2013 1. If you did not have a calculator last week, check in with me at the front. 2. Get a workbook. Open to page 1. Answer questions 2 – 25. Skip #24. Answer on warmup paper.

13 AgendaAugust 22, 2013 - Prep for Cereal Activity - Review Classification Activity and lecture. - Properties of Matter - Describing Matter using numbers - Significant Figures - Wrap up Chapter 1 HOMEWORK - Read pgs 10-19 - Section Review pg 28: 1,3-9, 11,13 do NOT need to write questions, only answers.

14 QUIZAugust 22, 2013 1. What is a pure substance that is made of only one kind of atom? 2. What is a pure substance that is made up of more than one kind of atom? 3. A mixture is a combination of two or more substances/ingredients that are [CHEMICALLY, PHYSICALLY] combined.

15 Warm-UpAugust 23, 2013 1. If you did not have a calculator last week, check in with me at the front. 2. What is a pure substance that is made of only one kind of atom? 3. What is a pure substance that is made up of more than one kind of atom? 4. A mixture is a combination of two or more substances/ingredients that are CHEMICALLY COMBINED or PHYSICALLY MIXED. 5. Differentiate between the two types of physical properties. In other words, how are the two types different from one another?

16 AgendaAugust 23, 2013 - Review Classification and Properties of Matter lecture. - Describing Matter using numbers - Significant Figures - Wrap up Chapter 1 HOMEWORK - Section Review pg 19: 2, 5, 6, 8-13 do NOT need to write questions, only answers.

17 QUIZAugust 23, 2013 1. Mass measures… 2. Weight measures… 3. Density is the ratio of …

18 QUIZAugust 23, 2013 1. Mass measures… 2. Weight measures… 3. Density is the ratio of …

19 Warm-UpAugust 26, 2013 1. How is an element different from a compound? 2. How is a mixture different from a compound? 3. What are the four guidelines for identifying a chemical change? 4. Differentiate between the two types of physical properties. In other words, how are the two types different from one another? 5. How is a homogeneous mixture different from a heterogeneous mixture? Provide an example.

20 AgendaAugust 26, 2013 - Go over Section Review 1.3 - Review Classification and Properties of Matter. - Begin section on Describing Matter using numbers - Significant Figures - Wrap up Chapter 1 HOMEWORK - Read pgs 10-19

21 Warm-UpAugust 27, 2013 1. How are mass and weight different? 2. What does density measure? 3. How is density calculated? 4. Which weighs more: a pound of brass blocks or a pound of marshmallows? Which is more dense? 5. What is the difference between a qualitative observation and a quantitative observation?

22 AgendaAugust 27, 2013 - Converting Units - Significant Figures - Wrap up Chapter 1 HOMEWORK - Section Review pg 19: 2, 5, 6, 8-13 do NOT need to write questions, only answers.

23 Warm-UpAugust 28, 2013 1. Workbook page 5, #13 and 14 2. Workbook page 6, # 16-30 3. Complete on same warmup paper from Monday

24 AgendaAugust 28, 2013 - Converting Units - Significant Figures - Wrap up Chapter 1 HOMEWORK - Section Review pg 19: 2, 5, 6, 8-13 do NOT need to write questions, only answers.

25 QUIZAugust 28, 2013 1. Mass measures… 2. Weight measures… 3. Density is the ratio of …

26 Warm-UpAugust 29, 2013 1. Workbook page 5, #13 and 14 2. Workbook page 6, # 16-30 Complete on same warmup paper from Tuesday

27 AgendaAugust 29, 2013 - More practice on converting units - Significant Figures - Wrap up Chapter 1 HOMEWORK - Worksheet: 37b – 48, SKIP 40 abc, 42abcd SHOW WORK, no work = no credit HAVE CORRECT # of SIG FIGs.

28 Warm-UpSeptember 3, 2013 1. Solids have a definite shape and volume because the strength of the attractive forces between the atoms are strong. To which part of the scientific method does this statement belong? 2. When solving problems of converting units, you always need the ______ ______. How do you know which part of the _____ _____ will be the numerator and which will be the denominator? 3. A football field is 100 yards in length. How long is a football field in meters if 1 m = 1.094 yds? 4. How much American dollars would you need to buy a $537 Australian dollar iPhone in Australia if the exchange rate is 1 US dollar = 1.13 Australian dollars?

29 AgendaSeptember 3, 2013 - Go over homework - Significant Figures HOMEWORK - Worksheet: 37b – 48, SKIP 40 abc, 42abcd, 43

30 Warm-UpSeptember 4, 2013 1. Solids have a definite shape and volume because the strength of the attractive forces between the atoms are strong. To which part of the scientific method does this statement belong? 2. When solving problems of converting units, you always need the ______ ______. How do you know which part of the _____ _____ will be the numerator and which will be the denominator? 3. A football field is 100 yards in length. How long is a football field in meters if 1 m = 1.094 yds? 4. How much American dollars would you need to buy a $537 Australian dollar iPhone in Australia if the exchange rate is 1 US dollar = 1.13 Australian dollars?

31 AgendaSeptember 4, 2013 - Go over homework: Holt pg 19 and worksheet - More practice with significant figures HOMEWORK - Worksheet: 56-60, 65, 68-69

32 Warm-UpSeptember 6, 2013 1. How many significant figures? 1.23410007 170000000.000000000017 0.0000100700010700.000 2. What are the four signs that signal a chemical change? 3. Distinguish mass and weight. 4. Distinguish law and theory. 5. Distinguish elements, molecules, compounds, pure substances, and mixtures.

33 AgendaSeptember 6, 2013 - Go over worksheet homework - More practice with significant figures HOMEWORK - Worksheet: 56-60, 65, 68-69

34 Warm-UpSeptember 9, 2013 1. How many significant figures? 1.23410007 170000000.000000000017 0.0000100700010700.000 2. What are the four signs that signal a chemical change? 3. Distinguish mass and weight. 4. Distinguish law and theory. 5. Distinguish elements, molecules, compounds, pure substances, and mixtures.

35 AgendaSeptember 9, 2013 - Go over worksheet homework - More practice with significant figures HOMEWORK - Study for Exam - Bring calculator - Bring textbook for next class.

36 Why Chemistry?

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40 Understanding chemistry is ESSENTIAL for understanding much of the natural word, and because chemistry is central to many other disciplines

41 Why Chemistry? Understanding chemistry is ESSENTIAL for understanding much of the natural word, and because chemistry is central to many other disciplines

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46 What is Chemistry?

47 Chemistry is the study of matter. What is matter?

48 What is Chemistry? What is matter? Matter is anything that has mass and occupies space. Essentially, matter = stuff.

49 What is Chemistry? If matter = stuff And chemistry is the study of matter, Then chemistry is the study of…

50 What is Chemistry? Chemistry is the study of stuff, or to be proper Chemistry is the study of matter.

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53 What is Chemistry? The properties of matter are determined by the properties of atoms and molecules. What are properties? In other words, the properties of stuff is really determined by the properties of the atoms/molecules that make up that stuff.

54 What is Chemistry? MAIN IDEA: properties of stuff is based on the properties of the atoms/molecules that make up the stuff.

55 What is Chemistry? Chemistry is the study of matter, or “stuff.” Chemistry studies matter/stuff by looking at the properties of the atoms/molecules that make up matter/stuff.

56 Scientific Method

57 -used in most fields of science - scientists use it -Involves steps to answer a scientific question -Can be used in life or death situations -Involves a hypothesis and observations.

58 Components of the Scientific Method 4 main components - Observation - Hypothesis - Experiment - Data - Law - Theory

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60 Qualitative - Describes properties - Does not rely on numbers - Examples - Clouds are white - Rocks are solids - Are measurements that involve NUMBERS and UNITS - Examples - This book weighs 20 pounds. - The temperature is 78 degrees C Quantitative

61 Law - WHAT - Summarizes the observations - Usually does not change - WHY - Provides the underlying reason(s) for the observations - Can change as we gather more data Theory

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68 1. Measured amounts of acid were added to a Rolaids tablet to see whether it really consumes 41 times its actual weight of excess stomach acid. 2. Heat always flows from hot objects to cooler ones, not the other way around. 3. The universe was formed by a massive explosion that propelled matter into a vacuum. 4. Michael Jordan is the greatest pure shooter ever to play professional basketball. 5. Limestone is relatively insoluble in water but dissolves readily in dilute acid with the evolution of a gas. 6. Gas mixtures that contain more than 4% hydrogen in are potentially explosive.

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72 Describing Matter States and Changes

73 States of Matter

74 Molecular workbench simulation

75 Changes of Matter Matter can go through changes. These changes can be classified into two categories: 1. Physical Change 2. Chemical Change

76 Changes of Matter Matter can go through changes. These changes can be classified into two categories: 1. Physical Change 2. Chemical Change 1. Physical Change: - These are changes in the arrangement, location, and speed of the particles. -Ice melting, water freezing, crushing a rock.

77 Changes of Matter

78 Guidelines for Identifying Chemical Change

79 Evidence of Chemical Change

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86 Classifying Matter Organizing Matter into Different Categories

87 Classifying Matter ALL matter is made up of atoms.

88 Classifying Matter ALL matter is made up of atoms. When something is made up of only one type of atoms, it is called and ELEMENT

89 Classifying Matter ALL matter is made up of atoms. When something is made up of only one type of atoms, it is called and ELEMENT. When two or more atoms are combined, we call that a MOLECULE.

90 Classifying Matter ALL matter is made up of atoms. When something is made up of only one type of atoms, it is called and ELEMENT When two or more atoms are combined, we call that a MOLECULE. When those atoms are different from one another, we call that a COMPOUND. Note that a compound is a type of molecule.

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92 Classifying Matter When matter, when a stuff is made up of only one type of ELEMENT or COMPOUND, we call that a PURE SUBSTANCE.

93 Classifying Matter When matter, when a stuff is made up of only one type of ELEMENT or COMPOUND, we call that a PURE SUBSTANCE. Or, to say in another way…when stuff is made of only one ingredient (one type of element or one type of compound), we call that a PURE SUBSTANCE.

94 Classifying Matter Or, to say in another way…when stuff is made of only one “ingredient” (one type of element or one type of compound), we call that a PURE SUBSTANCE. When stuff is made up of more than one PURE SUBSTANCE it is called a MIXTURE.

95 Classifying Matter Or, to say in another way…when stuff is made of only one “ingredient” (one type of element or one type of compound), we call that a PURE SUBSTANCE. When stuff is made up of more than one PURE SUBSTANCE it is called a MIXTURE. Note: Mixtures are physically mixed. They are not chemically combined.

96 Classifying Matter When stuff is made up of more than one PURE SUBSTANCE it is called a MIXTURE. Note: Mixtures are physically mixed. They are not chemically combined. If the mixture is mixed really well, if the pure substances are mixed evenly, we call that a HOMOGENEOUS MIXTURE.

97 Classifying Matter If the mixture is mixed really well, if the pure substances are mixed evenly, we call that a HOMOGENEOUS MIXTURE. If the mixture is not mixed well, if the pure substances are NOT mixed evenly, we call that a HETEROGENOUS MIXTURE.

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101 Classifying Matter based on composition

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103 Identify each substance as a compound, element, a heterogeneous mixture, or a homogeneous mixture. A. white wine B. mercury C. italian dressing D. table sugar

104 Classifying Matter based on composition Identify each as an element, a compound, a heterogeneous mixture, or a homogeneous mixture. 1. Tea 2. Gold 3. Freshly squeezed orange juice 4. Compact disc 5. H 2 O 6. Carbon dioxide 7. Aluminum oxide: Al 2 O 3

105 Classifying Matter based on composition

106 Properties of Matter

107 Changes to matter are either physical or chemical. Physical changes change the PHYSICAL properties of matter. Chemical changes are based on the CHEMICAL properties of matter.

108 Changes to matter are either physical or chemical. Physical changes change the PHYSICAL properties of matter. Chemical changes are based on the CHEMICAL properties of matter. CHEMICAL PROPERTY: describes a substance’s ability to participate and change in a chemical reaction.

109 Changes to matter are either physical or chemical. Physical changes change the PHYSICAL properties of matter. 2 Types of Physical Properties: Intensive Extensive

110 2 Types of Physical Properties: Intensive Extensive

111 2 Types of Physical Properties: Intensive Extensive Intensive: does NOT vary with amount of sample. Examples: smell, color, melting point, boiling point, ability to conduct a current.

112 2 Types of Physical Properties: Intensive Extensive Intensive: does NOT vary with amount of sample. Examples: smell, color, melting point, boiling point, ability to conduct a current. Extensive: DOES vary with amount of sample. Examples: Mass, weight, volume.

113 Intensive vs. Extensive Physical Property Intensive does NOT vary with amount of sample. Examples: smell, color, melting point, boiling point, ability to conduct a current, etc. Extensive DOES vary with amount of sample. Examples: Mass, weight, volume, etc.

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115 Describing Matter Using Numbers Measuring Extensive Physical Property

116 Volume – amount of space than an object takes Mass – measures amount of matter in an object. Mass is NOT the same as Weight Weight = is a measure of force. Weight measures the amount of gravity that is pulling an object.

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120 Derived Units Speed Area Volume Density

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122 Converting Units

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126 Powers of 10

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131 1. Convert 253 mL into liters 2. Convert 1258 cm into meters 3. Convert 15g to kilograms 4. Convert 1254 kilocalories to calories 5. How many seconds pass in 5.25 hours?

132 Converting Units and Dimensional Analysis 1. A pin is 2.85 cm in length. What is its length in inches if there are 2.54 cm in 1 in? 2. A pencil is 7.00 in. long. What is its length in centimeters? 2.54 cm per 1 in. 3. You want to order a bicycle with a 25.5 in frame, but the sizes in the catalog are given only in centimeters. What size should you order? 1 in = 2.54 cm.

133 Converting Units and Dimensional Analysis 1. A student entered a 10.0 km. How long is the run in miles? 1000 m = 1 km 1 m = 1.094 yd 1 mi = 1760 yd

134 Converting Units and Dimensional Analysis 1. The speed limit on many highways in the United States is 55 mi/hr. What number would be posted if we used kilometers per hour? 1 mi = 1760 yd 1 m = 1.094 yd

135 Converting Units and Dimensional Analysis 1. A Japanese car is advertised as having a gas mileage of 15 km/L. Convert this rating to miles per gallon. 1 m = 1094 yd 1 mi = 1760 yd 1 L = 1.06 qt 4 qt = 1 gal

136 Significant Figures Where to Round

137 Precision vs. Accuracy Accuracy Precision

138 Precision vs. Accuracy Accuracy – how close a measurement is to the actual value. Precision – how close the measurements are to other qunatitative data.

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140 Rules for Significant Figures 1. All nonzero #’s ARE significant. 2. Interior zeroes ARE significant. 3. Leading zeroes ARE NOT significant. 4. Trailing zeroes AFTER a decimal point ARE significant. 5. Trailing zeroes BEFORE a decimal point ARE significant 6. Trailing zeroes without a decimal point?

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142 How many significant figures? 1. 218 kg 2. 0.025 L 3. 200 g 4. 1.05 cm 5. 200.0 mg

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