Lab 2 chemical and physical changes answer key


lab 2 chemical and physical changes answer key _____ point is the temperature at which a liquid turns to a solid. _____ point is the temperature at which a liquid Chemical changes: The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change. Physical and Chemical Changes in Matter Webquest . Chemical Change DEFINE. A substance that speeds up a chemical reaction. b. -pc- sublimation 4. Lab Report: Physical and Chemical Changes The purpose of this lab is to take time to understand the difference between a chemical and physical change by performing an experiment. e d l r b o g c m i-n v s 7 8 Changes: Physical or Chemical? - Answer Key 1 When atoms gain, lose, or share electrons Physical & Chemical Changes, Matter & Energy 1. For each mixture, she puts a smaller amount of solid into a larger amount of liquid. Mowing the Lawn (PHYSICAL CHANGE) 9. Distinguish between extensive and intensive properties. By contrast, chemical changes occur at the molecular level when two or more molecules are interacting. Q. KEY: WORKSHEET ON CHEMICAL VS PHYSICAL PROPERTIES AND CHANGES Keep this in your binder as a study guide! Background: Keeping the difference between physical and chemical properties as well as changes can be a challenge! This worksheet will help you do this. Were ALL the IRREVERSIBLE CHANGES in this activity, PHYSICAL or CHEMICAL? ANSWER. The banana changes color from yellow to black. 0 & Answer Key Explain how certain mixtures can be separated. a. Chemical Properties Practice 1. Both elements and compounds (a key idea at the macro level) and atoms and molecules (which involve the same thinking at the micro level) are examples of this, but their usefulness can be developed by showing (among many other things) how they can help make sense of physical versus chemical changes. Irreversible changes cannot be undone. The Mystery Powders Lab: Physical and Chemical Changes Background Information: You have learned how to describe matter based on its physical and chemical properties. physical changes are easier to reverse than chemical changes. Reactants Describe 3 properties of reactants (starting substances) Describe 3 properties of products (final substances) Physical (P) or Chemical (C) Change? How do you know whether it was a physical or chemical change? 1 sodium bicarbonate + acetic acid 2 copper (II) sulfate + water Unit 1 & 2 Test Review Physical and chemical properties…including intensive and extensive AND Physical and chemical change chemical density mass properties physical substance Matter is anything with (1) ___mass_____and volume. changes they undergo. A physical change is a change of matter from one form to another without a change in chemical properties. The methods used in this lab are physical changes as the Fe, NaCl, and SiO 2 do not change in composition. These changes can be divided into 2 classes: physical changes and chemical changes. In a physical change, the chemical com-position of a substance does not change. 7. Chemical changes alter the very internal make-up of the substance, usually by a chemical reaction. First, use the book to define the following terms. o differences between physical and chemical changes at the particulate level. Changing the size and shapes of pieces of wood would be a chemical change. Write each Materials Physical and Chemical Changes Sorting Worksheet & Cards (pdf) Laminate and cut cards apart, place in zip-top bags 1 set per 2-3 students Answers for Physical Change are: cracking eggs, slicing bread, ice melting, glass breaking, boiling water, fresh lemonade, mowing lawn (cutting the grass) Optional - privacy screen made of one manila folder… Science Benchmark 2 Study Guide 2017 1 Physical and Chemical Changes: ANSWER KEY Define: Mixture: two or more substances combine and DO NOT make a new substance Physical Change: two or more substances combine and DO NOT make a new substance Chemical Change: two or more substances react to create a new substance Physical Change Chemical Change Explanation 1. pp length of metal object 6. 2. Physical and Chemical Changes Lab Chapter 5 SG 5. When platinum is heated, then cooled to its original state, we say this is a physical change. The alcohol must first evaporate, which is a physical change, before it burns (the chemical change. ___ T__ 18. Density (1/1) 8. Physical properties can be observed without changing the type of matter. Physical and Chemical Changes and Properties of Matter Worksheet Classify the following as chemical change (cc), chemical property (cp), physical change (pc), or physical property (pp). When you FREEZE the ice to SLIP UP Skull, what kind of CHANGE is occurring, PHYSICAL or CHEMICAL? How do you know? 20. In a chemical change, a new substance is produced. Physical and Chemical Properties of Matter: . Matter can undergo either physical or chemical changes. A physical change is a process in which one or more substances change into another or others which are different. Identify chemical and physical changes by observing a variety of reactions. behavior (1/1) 10. Heat conductivity 2. Physical and Chemical Changes in Matter Webquest. physical c. substrate 1. FALSE-CHEMICAL CHANGE. Physical changes occur when objects undergo a change that does not change their chemical nature. doc Author: Brent White Created Date: 7/5/2005 4:19:43 PM Purpose: To describe the physical and chemical properties of matter based on the . increases the rate of a chemical reaction without becoming part of the product A change in size or shape is a physical change. Challenge Problems Chemistry: Matter and Change • Chapter 3 3 Physical and Chemical Changes Physical and Chemical Changes Physical and chemical changes occur all around us. 2 The Wave and Particle Nature of Light Bohr's Model/Quantum Mechanical Model Orbital Diagrams SG 5. (use each one once: physical and chemical) 20. A chemical change means a new substance with new properties was formed. 2 ). Physical and chemical change worksheet multiple choice for 1 and 2 write a p for physical change and a c for chemical change. observed with senses 1. liquid state (2/1) 6. A physical change Title: Physical and Chemical Changes Question and Answer Author: Rayda Reed Created Date: 7/11/2011 2:39:17 PM Title: Microsoft Word - 2-04a-Physical Chemical Wkst 2-Key. In a physical change, the chemical makeup of the original products remains the same and only its physical attributes may differ through processes such as water melting and freezing. Color change is evidence that a chemical change may have occurred. Unit 2 Matter. 2 grams of the substance in our test tubes. After reading the information at this site answer these questions. It is also equal to the _____ point which is the temperature at which a _____ turns to a _____. 4. e d h l p r b o g c m i-n v s h t p: / w. Vocabulary. A physical change is a change in the state or properties of matter without any accompanying change in its chemical composition (the identities of the substances contained in the matter). Give TWO key features of CHEMICAL changes Not easily reversed, new smell/odor, colour change, new substance formed, precipitation occurs . Separating Sand From Gravel (PHYSICAL CHANGE) 6. Pre-Lab Discussion: Chemistry is the study of matter and the changes it undergoes. The answer key shows you how the answer was calculated if you had any trouble. Question: How do you determine whether a change is chemical or physical? Hypothesis: (write a hypothesis before you begin) Procedure: 1. Evaporation is a physical change. determined without changing matter reacts with something e. Worksheet - Periodic . Prelab Question 1. increases the rate of a chemical reaction without becoming part of the product Lab Report: Physical and Chemical Changes The purpose of this lab is to take time to understand the difference between a chemical and physical change by performing an experiment. explosion of nitroglycerin c. TASK #1 . Chemical changes involve the bonds in a compound being broken and new bonds being formed . Put an “X” in the correct column to indicate whether the experiment demonstrates a physical change or a chemical change. Rotten Food (CHEMICAL CHANGE) 7. Unit 1 & 2 Test Review Physical and chemical properties…including intensive and extensive AND Physical and chemical change chemical density mass properties physical substance Matter is anything with (1) ___mass_____and volume. a new substance is formed Identify the. amount (1/1) 7. Label each as either physical or chemical change. Give TWO key features of CHEMICAL changes Not easily reversed, new smell/odor, colour change, new substance formed, precipitation occurs, effervescence, 2. - Physical vs. : a solution is when the chemical is dissolved in water. no new substance is formed chemical properties. A physical change _____ be reversed. Catalyst DEFINE. ___ F__ 17. melts (see Figure L2. water vapor condensing on the metal 2. Examples of such physical properties are: size, shape, color, and state of matter. 6. She is trying to determine if mixing these substances produces any physical or chemical changes. QC. exploding . One of the many places in which physical and chemical changes occur is the kitchen. Left side: C = 2, H = 4, O = 6 Right side: C = 2, H = 4, O = 6 balanced 3. Iron, for example, combines with oxygen in the presence of water to form rust; chromium does not oxidize (Figure 1. Tags: Lab Report: Physical and Chemical Changes The purpose of this lab is to take time to understand the difference between a chemical and physical change by performing an experiment. TASK #1. Some examples of chemical changes are the formation of gases . ___ T__ 16. A physical change involves a change in physical properties. Grade 10 science answer key . The student is expected to: 6. Key: a. 3 / 1 2 0 5 w. Breaking, crumpling, or molding matter . melting or boiling (2/1) 9. Physical & Chemical Changes Lab Purpose This experiment will continue your introduction to physical and chemical changes, with an emphasis on learning to make quantitative observations related to chemical change. Is making water a chemical or physical change? Use evidence from the definitions above or from the PhET to support your answer. A scientist has a collection of substances, both solids and liquids, that she mixes in different combinations. The molecules that make up the pineapple are not being Worksheet: Physical/Chemical Properties/Changes Name Read the following properties and changes. iron rusting b. In a physical change, one or more physical properties of a substance are altered. Provide justification for identifying a reaction as chemical or physical. ice melting This is a physical change because H 2 O is changing from a solid state to a liquid state. Chemical or Physical Because… Water is exactly the same as hydrogen and oxygen The atoms rearranged themselves and the water is something different than Oxygen and Hydrogen 1. A Rusting Bicycle (CHEMICAL CHANGE) 4. Helium boils at 4. For example, cooking spaghetti in a pot of water on the stove involves such changes. boiling point color getting a haircut acidity lighting a' candle texture Lab Report: Physical and Chemical Changes The purpose of this lab is to take time to understand the difference between a chemical and physical change by performing an experiment. They are still egg whites (not a new substance) so this is a physical change. Physical and chemical properties answer key. 2 Exploration - Physical and Chemical Changes Station Lab - M Reading NO ANSWERS 2 Exploration - Chemical Changes Station Lab - Answer Sheet ONLY Chapter 2 Answer key. a change in the physical and. The size or shape of matter often changes, but there is no chemical reaction. Mass is conserved in every physical change or chemical reaction. Obtain a test tube with warm bath water and add the warm bath water with the cold water in the water and placing it in the trash can and dump the water down the sink. Some examples of physical changes are dissolution of sugar, cutting of wood, and dry ice subliming. Remove the baking soda cups from your box. Method Each part of this lab had its own procedure and depending on which one, we took approximately 0. Two clear, colorless solutions are mixed and a yellow solid forms. Combining hydrogen and oxygen to make water is a physical change. Chemical equations are symbolic representations of chemical and physical changes. 34. ANSWER. 4 stations with a lab answer sheet. mass, law of conservation of mass (4/2) 16. gained or released (4/2) 14. a change in size, shape, or state 1. 2 g Section 2. CHEMICAL CHANGE Name In a physical change, the original substance still exists, it has only changed in form. Chemical Changes are changes of one or more substances into other substances by chemical reactions. Question 16. TRUE. KEY ////p Class Assessment sEc;r7ÌòJ Matter and Change Date Section Quiz: Chemistry Is a Physical Science In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question. Whipping egg whites simply adds air into the egg whites, making them foamy. physical b. Is BURNING a PHYSICAL or CHEMICAL change? How do you know? 18. RC shortening melting 7. In this lab, materials such as calcium carbonate, water, iron filings and sulfur, among others were used to investigate a type of change and the reasoning for the change. Lab # 6: Physical and Chemical Changes 7 PRESTUDY 1. Chemical and Physical 39exerciseA Processes of Digestion: Wet Lab Review Sheet 39A 301 Chemical Digestion of Foodstuffs: Enzymatic Action 1. Apr 29, 2014 — Student worksheet. 3. Evaporation occurs when liquid water changes into a gas. PHYSICAL CHANGE CHEMICAL CHANGE. Answers Glencoe Virtual Labs via. Physical Changes. We observe a physical change when wax melts, when sugar dissolves in coffee, and when steam condenses into liquid water ( Figure 1 ). l. 4. 2 Writing . enzyme d. You have also learned some clues that tell you whether a physical change or a chemical change is occurring. Mixture Solid Liquid Observation after mixing Balancing chemical equations part a. To observe some properties of chemical reactions 2. Chemical changes involve the rearrangement of molecules or atoms and result in the pro-duction of one or more new substances. An example of a chemical change is when water freezes. These may not be observed with naked eye. 5D identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a . Reversible and Irreversible Changes: . Explain how you will be able to tell the difference between a chemical change and a physical change. Pre-lab Questions: 1. In a physical change, the substances remain the same. VIRTUAL LAB: Physical and Chemical Changes Beginning Question: How do Pre-Lab Discussion: Chemistry is the study of matter and the changes it undergoes. 3 Abbreviated Configurations Using Electron Configurations Chapter 5 Supplemental Problems Chapter 5 Review  Chapter 8 Counting Atoms & Dot Structures SG 8. What does the speaker call the material that does the dissolving? 19. Title: Physical and Chemical Changes Question and Answer Author: Rayda Reed Created Date: 7/11/2011 2:39:17 PM Purpose: To describe the physical and chemical properties of matter based on the . 1). Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion. control c. SURVEY. gas or solid (3/2) 15. Answer key follows. FALSE. Reversible changes can be undone, or reversed. 1. Physical changes involve altering the appearance but not the composition of a substance. page 39 #1-9. PHYSICAL AND CHEMICAL PROPERTIES AND CHANGES PHYSICAL PROPERTY CHEMICAL PROPERTY 1. Once everyone has agreed, place the card on the correct side of the poster. These changes occur due to chemical reactions. The question explicitly uses the concept of burning, so answering this one as both a physical and a chemical change (if asked on a test) would probably garner partial credit. To associate chemical properties with household products Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. If left long enough, the banana may take on a certain odor. The H 2 O molecule remains the same, just in a di erent state of matter. Formation of a gas, color changes, and the production of heat/light are all signals that a . Inform your TA before Friday May 7th at 300 pm of any lab report issues so they can be fixed ASAP. VOCABULARY WORD DEFINITION Upon completion, the learner will be able to differentiate between physical and chemical changes. When milk turns sour, this is . A chemical change is defined as a change in the composition and properties of a substance. Record your answers in the table below by placing an “X” in the physical or chemical change box: Card Number Physical Change Chemical Change 1 2 3 Lab Report: Physical and Chemical Changes The purpose of this lab is to take time to understand the difference between a chemical and physical change by performing an experiment. 1 Flame Test Lab SG 5. Silver tarnishing 3. Chemical In this lab you will: 1. answer choices. cutting a pineapple into pieces This is a physical change. The change of one type of matter into another type (or the inability to change) is a chemical property. chemical property (1/1) 11. These changes are irreversible. These include melting, boiling, vaporization, freezing, sublimation and deposition. 30 seconds. 22 K. Glass Breaking (PHYSICAL CHANGE) 2. . Thus, something that is a physical change would be labeled PC. For each process described, state whether the material being discussed (in bold) is a mixture or compound, and state whether the change is physical or chemical. Middle School answer key for Science Explorer . Phase changes are physical changes. . Answer sheet is a cut & paste or students can write the answers in the boxes. Burning wood is a physical change. What is a physical change in matter? 2. Experiment 3- Place a piece of magnesium in a clean, dry test tube. Simple lab for evaluating chemical and physical changes when making S'mores, snowflakes, elephant toothpaste, Mentos/diet coke, and fireworks. The study of the composition, structure, and properties of matter; Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. (1) Classify the following as chemical (C) or physical (P) changes. pdf from SCI SNC2D1 at Pickering High School, Ajax. Physical changes usually involve a compounds state of matter where heat energy is added or removed. Phase changes are _____ changes. chemical change (4/2) 3. the description on the back. In a physical change, the makeup of matter is changed. catalyst b. indicates how a substance 2. In a chemical change, a new substance _____ formed. Energy changes always accompany chemical changes. The student knows the characteristics of matter and can analyze the relationships between chemical and physical changes and properties. Worksheet on chemical vs physical properties and changes keep this in your binder as a study guide! Lab Report: Physical and Chemical Changes The purpose of this lab is to take time to understand the difference between a chemical and physical change by performing an experiment. MISCONCEPTIONS “Students prefer to base their categorizations of matter on intuition and not on scientific concepts” (Horton, 2007). Distinguish between physical and chemical changes. In a chemical change, the chemical com-position of the reactants changes as one or more products form. A physical change is a change in matter that alters its form but not its chemical identity. (2) Write the following underlined reaction in terms of a balanced equation. What is a chemical change in matter? 3. chemical (4/2) 4. Melting Butter for Popcorn (PHYSICAL CHANGE) 5. View _Physical and Chemical Change Virtual lab. 32. Mixing Kool-Aid powder into water (PHYSICAL CHANGE) 8. Match the following definitions with the proper choices from the key. 2 O 10. 0 & Answer Key Distinguish between physical and chemical properties of matter. Energy changes usually do not accompany physical changes, except in phase changes and when substances dissolve. - Classification of Matter Practice 1. Upon completion, the learner will be able to differentiate between physical and chemical changes. 5. Record your answers in the table below by placing an “X” in the physical or chemical change box: Card Number Physical Change Chemical Change 1 2 3 17. Possible answer: In a chemical change, the substances change into other substances with new properties. magnetizing steel 5. Students will construct scientifically-based methods for categorizing physical and chemical changes. A (2) _substance_____ is a form of matter with a uniform and unchanging composition. 2 Video – Chemical changes Lab – Physical and change Matter has observable physical properties and. Remember a physical change involves a change in a physical property but the Physical Changes are changes that alter a material without altering its composition. Color (3/2) 13. Physical and Chemical Changes Worksheet Name:_____ Fill in the blanks using the word bank: 1. A physical change is a change that occurs when a substance changes composition by forming one or more new substances. A type of change in which a new substance is formed. ___ F__ 19. Decide whether your group thinks each one is a physical change or a chemical change. solid,liquid,gas. Write each 1. physical (4/2) 17 . 4 Chemical Reactions . Every sample of a given substance has the same chemical composition. Physical changes are either reversible or irreversible. chemical reactions occur when atoms re-arrange to form new substances with new and different properties (choose one: physical or chemical) 21. Physical and chemical changes Virtual lab answer key. For this reason, physical changes can be reversed. Hire a subject expert to help you with Chemical and Physical Changes Lab Report. Can a physical change, change what a substance is? Explain your answer by giving an Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. Deposition (3/2) 12. state (3/2) 5. PHYSICAL VS. chemical d. 43. Scientists classify changes in matter as either a chemical change or a physical change. Hammering Wood Together (PHYSICAL CHANGE) 3. Decide if each one is physical (P) or chemical (C), and whether it is a property (P) or a change (C). chemical 33. lab 2 chemical and physical changes answer key

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