7th Grade Ch 2 Sec 1 States Of Matter

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7th Grade Ch 2 Sec 1 States Of Matter

  1. 1. Ch. 2 Sec. 1 States of Matter  
  2. 2. This Japanese macaque soaks in a hot spring. In and around the spring, water exists as a liquid, solid, and gas.
  3. 3. solid <ul><li>   definite shape & definite volume   </li></ul><ul><li>particles inside- packed tightly & stay </li></ul><ul><li>in fixed positions </li></ul><ul><li>- not motionless- vibrate </li></ul>
  4. 4. Hot, liquid lava flows from a volcano. When it cools to a solid, new rock will be formed.
  5. 5. types of solids <ul><li>1.    crystalline solid = solid made up of crystals </li></ul><ul><ul><ul><ul><li>ex: salt, sugar, sand, snow </li></ul></ul></ul></ul>
  6. 6. types of solids <ul><li>2.  amorphous solid = particles not arranged in regular pattern </li></ul><ul><ul><ul><ul><li>no distinct melting point </li></ul></ul></ul></ul><ul><ul><ul><ul><li>ex: plastics, rubber, glass </li></ul></ul></ul></ul>
  7. 8. liquid <ul><li>no definite shape </li></ul><ul><li>takes shape of its container </li></ul><ul><li>definite volume       </li></ul>
  8. 9. A liquid takes the shape of its container but its volume does not change.
  9. 10. Particles in a liquid are packed close together but move freely, allowing liquids to flow.
  10. 11. <ul><li>substance that flows </li></ul><ul><li>liquids & gases </li></ul>YouTube video-Bill Nye Fluids song
  11. 12. surface tension <ul><li>result of inward pull among molecules of a liquid that brings molecules on surface closer together </li></ul>
  12. 13. Due to surface tension, the surface of water can act like a sort of skin.
  13. 14. viscosity <ul><li>resistance of a liquid to flowing </li></ul><ul><ul><ul><ul><li>-high viscosity-flow slowly </li></ul></ul></ul></ul><ul><ul><ul><ul><li>-low viscosity-flow quickly </li></ul></ul></ul></ul>
  14. 15. gas <ul><li>     no definite shape </li></ul><ul><li>     no definite volume </li></ul><ul><li>     particles spread apart- </li></ul><ul><li>filling all available space </li></ul>
  15. 16. Time to Review
  16. 17. types of solids <ul><li>1.    crystalline solids </li></ul><ul><li>2. amorphous solids </li></ul>
  17. 18. crystalline solid or amorphous solid amorphous solid glass
  18. 19. crystalline solid or amorphous solid crystalline solid
  19. 20. crystalline solid or amorphous solid crystalline solid
  20. 21. crystalline solid or amorphous solid amorphous solid
  21. 22. crystalline solid or amorphous solid crystalline solid sugar
  22. 23. solid <ul><li>   definite shape & definite volume   </li></ul><ul><li>particles inside- packed tightly & stay </li></ul><ul><li>in fixed positions </li></ul><ul><li>- not motionless- vibrate </li></ul>
  23. 24. gas <ul><li>     no definite shape </li></ul><ul><li>     no definite volume </li></ul><ul><li>     particles spread apart- </li></ul><ul><li>filling all available space </li></ul>
  24. 25. surface tension <ul><li>result of inward pull among molecules of a liquid that brings molecules on surface closer together </li></ul>
  25. 26. liquid <ul><li>no definite shape </li></ul><ul><li>takes shape of its container </li></ul><ul><li>definite volume       </li></ul>
  26. 27. <ul><li>substance that flows </li></ul><ul><li>liquids & gases </li></ul>YouTube video-Bill Nye Fluids song
  27. 28. <ul><li>Describe the properties of the shaving cream. Is it a solid, liquid, or a gas?  Why do you think so?  </li></ul><ul><li>Gently place a penny on top of it.  What happens?  </li></ul><ul><li>Rub some shaving cream between your thumb and index finger.  How does it feel?  </li></ul><ul><li>Let the shaving cream sit out overnight.  </li></ul><ul><li>Did you notice any change?   Examine the shaving cream blob with a magnifying glass.  What does it look like?  </li></ul>Solid, Liquid, or Gas?
  28. 29. <ul><li>Solid, Liquid, or Gas? Part 2 </li></ul><ul><li>1.Describe the properties of the cornstarch and water mixture. </li></ul><ul><li>2.Does the cornstarch mixture have attributes like a solid or a liquid? </li></ul><ul><li>3.How did the cornstarch mixture feel when you touched it? </li></ul><ul><li>4.What happened to the cornstarch mixture when you tried to pour it? </li></ul><ul><li>5. Name at least two unusual characteristics of the cornstarch mixture. </li></ul>
  29. 30. Viscosity Experiment Predict 6. PANCAKE SYRUP 5. KARO SYRUP Rate (# of seconds) 7. CONDITIONER 4. SHAMPOO 3. EX-LAX <ul><li>VEGETABLE OIL </li></ul><ul><li>WATER </li></ul>High or low viscosity Fluid
  30. 31. Draw, label & color a picture of the following: <ul><li>Solid </li></ul><ul><li>Liquid </li></ul><ul><li>Gas </li></ul><ul><li>Amorphous solid </li></ul><ul><li>Crystalline solid </li></ul><ul><li>Fluid </li></ul>Pencil-solid

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