Activating Strategy Engage Your Brain- page 21- Answer #1-2 Write the Lesson Essential Question in the note section of your lesson packet. EQ: How does matter undergo chemical and physical changes? 1

Active Reading page 21 Complete #3 PHYSICAL EDUCATION- page 22 What are physical properties of matter? Normally, when describing an object, you identify what it is about that object that you can observe without changing its identity. 2

A characteristic of a substance that can be observed and measured without changing the identity of the substance is called a physical property. All of your senses can be used to detect physical properties. Color, shape, size and texture are a few of the properties you encounter. Answer Question #5 on page 22 3

Physical properties can be observed without changing the identity of the substance. The boiling point of water is an example of a physical property. Water is water whether it is a solid, liquid or gas. In your table groups, discuss and answer #6 The objects are gold, the table, and person in a suit. 4

Answer #6 Gold- it is a solid, liquid, gold in color, it is able to be shaped or bent. Table- round, heavy, and large Person in suit- thick and heavy 5

#7 Thinking Outside the Box- Mystery Object On the 3x5 card, place your name in the upper right corner. Describe a common object by making a list of at least 3-4 physical properties. THESE SHOULD BE ONE WORD CLUES---NO SENTENCES If you need help with physical properties go back to page 22 to seek help!!! 6

Now you will be given a new 3X5 card. You will need to try and guess what object is being described by one of your classmates. Write the name of the object in the bottom left hand corner. Write your name in the bottom right hand corner. Who thinks that they could stump a classmate with your description? 7

Common Physical Properties- page 24 With your table group partners, observe the pictures and explanations on page 24 and 25 and answer questions #8 thru 11. Answer Question #8- The vinegar is more dense than that oil because it sank to the bottom. Answer Question #9- Yes because solubility is a physical property. The solid particles of the drink mix would be left behind. 8

Answer #10- Aluminum can be rolled into sheets of aluminum foil that are used in food packaging. Answer #11- Both the geyser’s eruption and the tea kettle whistle are both caused by water vapor. As water boils, the vapor escapes through the hole in the tea kettle causing the whistle. 9

What are chemical properties of matter? Page 26 A chemical property describes a substance’s ability to change into a new substance with different properties. Common chemical properties include flammability and reactivity with substances such as oxygen, water, and acids. Examples, Rusting and tarnishing are chemical properties because the metal changes. 10

Questions #13- With your table partners, I would like you to brainstorm an answer to the question. Answer: Iron and steel rust more easily in we climates because there is more moisture in the air. This allows more oxygen to come into contact with metal to make rust. 11

Page 27 Wood for a campfire has the chemical property of flammability (the ability to burn). When wood burns, new substances are formed: water: carbon dioxide, and ash. Reactivity-the ability of a substance to interact with another substance to form a new substance. 12

Page #28: What is the difference between physical and chemical properties? A physical property can always be observed without changing the identity of a substance. A chemical property is observed by attempting to change the identity of a substance. Example: To witness a log’s flammability, you must try and set the log on fire. 13

With your table group partners, answer question #14, 15, and 16. Answers: #14- A Physical property can be seen without changing the identity of the matter. A chemical property cannot be seen without changing the identity of the matter. 14

Answer #15: The nail on the left shows the physical property of malleability. The nail is bent- it can be seen without changing the identity of the substance. The nail on the right shows the chemical property of reactivity. The nail’s identity has been changed by the reactivity of the iron in the nail and oxygen. 15

Answer #16- Malleable = Physical Reacts with oxygen= Chemical Magnetic=physical Nonflammable=chemical THE COOLEST CHEMICAL REACTIONS 16

Page#30 How can physical and chemical properties identify a substance? Properties unique to a substance are its characteristic properties. Characteristic properties can be physical or chemical properties. Since gold has density four times that of iron pyrite, distinguishing gold from iron pyrite should be easy. Mining For Gold 17

DO THE MATH Sample Problem page 31 “You Try It” page 31- calculate the density of the unknown object and make sure you answer the question at the end. 18

Complete the questions on page 32 with your table groups. 22) Solubility 23) Liquid 24) Reactivity with water 25) Burn 26) Do not 27) Compare Conductivity and Density 19

Complete Page #33 All Questions If you do not finish in class, the remaining questions are to be completed for homework. 20

Lesson Review Page 33 1) Chemical 2) Physical 3) It is a solid, It is shiny, It is malleable 4) There is no effect because the identity of the substance does not change. 5) You can cut a substance in half which would change the mass but not the substance. 6) Yes, if you observe a chemical property, new substances are being made. 21

7) Sample A= Iodine Sample B= Bromine Sample C=Chlorine 8) The volume of iron pyrite is more than the volume of gold. 9) Physical Properties Density- less than water Enough strength to not break It is insoluble in water 22

#9 Continued Chemical Properties Does not react with water 23

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