Changes in Matter Chapter 2 Section 2

Physical Change A physical change is any change that alters the form or appearance of matter A physical change does not make new substances A substance that undergoes a physical change is still the same substance after the change.

Physical Change An example of a physical change is the change that water goes through when thermal energy is added Solid H2O Liquid H2O Gas H2O

Changes in Shape of Form Other examples of physical change include dissolving, bending, crushing, breaking, chopping, and anything else that changes only the shape or form. This is an example of why you shouldn’t drink and a physical change, enjoy!..\..\..\..\..\Downloads\video.mp4

Chemical Change A chemical change is any change in matter that produces one or more new substance. A chemical change is also called a chemical reaction There are different types of chemical reactions A chemical change produces new substances with properties different from those of the original substance. chemical change

Types of Chemical Changes Change in color. Change in odor May produce a gas or precipitate ../../../../../Downloads/precipitate.mp4 Energy may be released or absorbed Forms a new substance Can NOT be easily reversed

Science Investigation change observed evidence of change classify change as physical or chemical smashed aluminum can change of shape of the can physical change burnt toast change of color/smell chemical

Chemical Change or Physical Change?? List the physical properties of the solid List the physical properties of the liquid On a piece of paper crush the solid. Describe the changes that occur Place some of the crushed solid in the cup and add 15 drops of the liquid describe what happens, describe the change

Was this a chemical or a physical change? Provide evidence to support your answer Summarize the purpose of the lesson. Create a hypothetical question, a “what if.” Answer your “what if question”

Law of Conservation of Matter The principle that the total amount of matter is neither created nor destroyed during ANY chemical or physical change it is rearranged. This law is also called the law of conservation of mass Draw figure 15 on page 71

This is an example of a chemical reaction at the molecular level Notice that the atoms on one side of the reaction are also on the other side of the reaction

Math - Analyzing Data (pg 72) Propane Combustion Mass of C3H8 Reacted (g) Mass of O2 Mass of CO2 Produced (g) Amount of water vapor produced 44 160 132 250 909 750 400 1,455 1,200 465 1,691 1,395

Explain your findings in terms of The Law of Conservation of Matter Type of Matter Foil Ball of Foil Pieces of Foil Cookie Pieces of Cookie Properties Weight in Grams Explain your findings in terms of The Law of Conservation of Matter

Law of Conservation Describe the experiment that you preformed Explain the data that you collected Explain your results in terms of The Law of Conservation of Matter

Can you guess the correct answers and do better than this?