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Changes in Matter                                                                                                                                                           

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Presentation on theme: "Changes in Matter                                                                                                                                                           "— Presentation transcript:

1 Changes in Matter                                                                                                                                                            Section 3

2 Learning Targets I can identify physical and chemical changes.

3 Physical Changes

4 Physical Changes Affects one or more physical properties of a substance Does not change the identity of the substance Matter undergoes a change in size, shape or phase

5 Physical Changes Is dissolving a physical change? Why? Yes
Diagram: cnx.org Glass of water: websters-online-dictionary.org

6 Physical Changes Ice melting: learner.org
Chainsaw: aljabrgrade5.wikispaces.com Crumpled paper: curriculumextras.com

7 Chemical Changes

8 Chemical Changes Happens when one or more substances are changed into entirely new substances that have different properties Happens everywhere Breathing Fruit ripening Digesting food

9 Chemical Changes yeosweeguan.edu.glogster.com

10 How Chemical Changes Can Be Detected
Change in odor Change in color Fizzing or foaming Formation of a precipitate (solid) Production of sound, heat, or light

11 Chemical Changes Cannot be reversed with physical changes
Some can be reversed with chemical changes

12 Identify the chemical changes.
whenthedinnerbellrings.blogspot.com Odor, color change, sound?

13 Breaking Down Mixtures and Compounds
What is the difference between the two? Mixtures Can be separated by physical means Test tubes: chesleyfoundation.ca Centrifuge:

14 Compounds Broken down through chemical changes Mercury Oxide

15 Physical or Chemical Change?


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