Properties of matter

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Properties of matter

  1. 1. The Properties of Matter Looking at Matter at the Molecular Level
  2. 2. Matter <ul><li>Everything is made of MATTER! </li></ul><ul><li>Matter is anything that has volume and mass. </li></ul><ul><li>Volume is the amount of space an object takes up, or occupies. </li></ul>
  3. 3. Describing Matter <ul><li>The characteristics or properties of an object can help you identify the substance. </li></ul><ul><li>Substances have unique properties and characteristics. </li></ul>
  4. 4. Properties of Matter <ul><li>There are: </li></ul><ul><ul><li>Physical Properties </li></ul></ul><ul><ul><li>Chemical Properties </li></ul></ul>
  5. 5. Physical Properties <ul><li>Things that describe the object are physical properties. </li></ul><ul><li>Physical properties can also be observed or measured without changing the identity of the matter. </li></ul><ul><li>Examples of physical properties include: color, odor, size, state, density, solubility, melting point, etc… </li></ul>
  6. 6. Chemical Properties <ul><li>Chemical properties describe a substance based on its ability to change into a new substance with different properties. </li></ul><ul><li>Ex: wood burns to form ash and smoke </li></ul><ul><li>Chemical properties cannot be observed with your senses. </li></ul><ul><li>Chemical properties aren’t as easy to observe as physical properties. </li></ul><ul><li>Examples of chemical properties: flammability and reactivity </li></ul>
  7. 7. Characteristic Properties <ul><li>The properties that are most useful in identifying a substance are its characteristic properties. </li></ul><ul><li>Remember the difference between physical and chemical properties. </li></ul><ul><li>Physical properties can be observed! (with your eyes!) IDENTITY OF SUBSTANCE DOES NOT CHANGE! </li></ul><ul><li>You can observe chemical properties only in situations in which the identity of the substance could change. </li></ul>
  8. 8. Matter undergoes changes <ul><li>There are 2 types of changes: </li></ul><ul><li>Physical changes </li></ul><ul><li>Chemical changes </li></ul>
  9. 9. Physical Changes <ul><li>A physical change is a change that affects one or more physical properties of a substance. </li></ul><ul><li>Physical changes do not form new substances! EX: ice melting or sugar dissolving </li></ul><ul><li>Physical changes are easy to undo. </li></ul>
  10. 10. Chemical Changes <ul><li>A chemical change occurs when one or more substances are changed into entirely new substances with different properties. </li></ul><ul><li>You can observe chemical properties only when a chemical change might occur! </li></ul><ul><li>Examples of chem. changes: </li></ul><ul><li>baking a cake </li></ul><ul><li>rusting </li></ul>
  11. 11. Clues to chemical changes <ul><li>Color change </li></ul><ul><li>Fizzing or bubbling (gas production) </li></ul><ul><li>Heat </li></ul><ul><li>Production of light, sound, or odor. </li></ul><ul><li>Formation of a precipitate </li></ul><ul><li>Chemical changes are not usually reversible! </li></ul>

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