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Understanding Properties of Matter: Physical and Chemical Changes Explained

Dive into the fascinating world of matter with our exploration of physical and chemical properties. Learn how physical properties describe a substance without altering its composition, while chemical properties reveal how substances interact during reactions. Understand qualitative versus quantitative properties, and discover the differences between physical and chemical changes. Our resources, including videos and practice exercises, will help clarify these concepts, making it easier to identify and analyze changes in matter.

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Understanding Properties of Matter: Physical and Chemical Changes Explained

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Presentation Transcript

  1. Topic 2 Changes in Matter

  2. Properties of Matter • Physical Properties • Are used to describe a substance • Chemical Properties • Describe how a substance interacts with other substances. Chemical properties are only observable when a chemical change occurs. • physical and chemical properties http://www.youtube.com/watch?v=-Ypwtjp0FSE

  3. Properties of Matter • Physical Properties

  4. Physical Properties • Qualitative Property • A characteristic of a substance that can be described but might not be measured (a quality) • Quantitative Property • A characteristic of a substance that can be measured numerically (a quantity)

  5. Look back at the table of physical properties – Which are Qualitative? (QL) Which are Quantitative? (QN)

  6. Changes in Matter • Physical Changes • A substance changes form but not chemical composition • Chemical Changes • Causes one or more new substances to be formed. It may be impossible to reverse.

  7. Properties of Matter • Physical Changes

  8. Properties of Matter • Chemical Changes • Reacts with water • Reacts with air • Reacts with pure oxygen • Reacts with acids • Reacts with other pure substances • Toxicity • Stability • Combustibility

  9. 5 Types of Chemical Reactions Lab https://www.youtube.com/watch?v=nsEkKIiOz7Q https://www.youtube.com/watch?v=2qlb8X_ffO8 Chemical change song http://www.youtube.com/watch?v=I8aA7SjYsCA

  10. Identifying Physical and Chemical Changes • Look at the following pictures and document whether you think each is an example of a physical or chemical change.

  11. Physical or Chemical Change? • It is difficult to determine whether changes are physical or chemical. • The following chart will help you decide whether a chemical change has occurred. • In order to be completely sure, chemical analysis in a lab must take place.

  12. Complete: • 1. CNR back page of notes • 2. practice sheet on chemical and physical properties / changes

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