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Understanding Physical and Chemical Properties of Substances

This guide explores the essential physical and chemical properties of substances. Physical properties include characteristics like color, shape, size, texture, volume, mass, and density, observable without altering the identity of the substance. We will also review density calculations, demonstrating the relationship between mass and volume. In contrast, chemical properties involve the ability of substances to undergo chemical changes, such as burning, rusting, or exploding. Learn how to identify physical and chemical changes and their characteristics through practical examples and thought-provoking questions.

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Understanding Physical and Chemical Properties of Substances

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  1. Chemistry

  2. Physical Properties • I can describe this car by: • Red and black • Smooth texture • Mass of 28 g • Wheels are circular • 89 cm3

  3. The characteristics of a substance that can be observed without changing the identity of the substance. Color Shape Size Texture Volume Mass Density Physical Properties

  4. Let’s Review Density • If animal has a mass of 75 grams and has a volume of 25 cm3. What is animal’s density? • 75g/25cm3 = 3 g/cm3.

  5. Physical Properties

  6. Physical Change • A physical change is a change in a substance that does not change the substance into a different one.

  7. Physical Change

  8. How do I make a physical change?

  9. Chemical Properties • Describe how substances can form new substances. • Ability for wood to burn • Ability for metal to rust • Ability for material to explode

  10. Chemical Changes • The change of one substance into another substance. • Production of odor • Change in temperature • Change in color • Formation of bubbles • Formation of a solid

  11. How can I make the wood have a chemical change?

  12. What can be done with the pizza to have a chemical change?

  13. How can you tell a chemical change has taken place?

  14. Is it Physical or Chemical?

  15. Is it physical or chemical?

  16. Is it physical or chemical?

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