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Pure Substance or Mixture?

Pure Substance or Mixture?. Water Pure Soil Mixture Gatorade Mixture Iron Pure. Kinetic Theory. 12/4. Motion. Kinetic theory is all about how particles move Key ideas All matter made of atoms that act like tiny particles The tiny particles are always in motion

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Pure Substance or Mixture?

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  1. Pure Substance or Mixture? • Water • Pure • Soil • Mixture • Gatorade • Mixture • Iron • Pure

  2. Kinetic Theory 12/4

  3. Motion • Kinetic theory is all about how particles move • Key ideas • All matter made of atoms that act like tiny particles • The tiny particles are always in motion • The tiny particles are always colliding with one another

  4. Solids • Particles constantly move • Vibrate against one another • Definite shape and volume

  5. Liquids • Particles constantly move • Slide past one another • Indefinite Shape • Definite Volume

  6. Gas • Particles constantly move • Collide with one another and container • Indefinite Shape and Volume • Fill the container they are in • Balloons!

  7. Plasma? • Similar to properties of gases, but also conducts electricity and reacts to magnetic fields

  8. Fluids • A nonsolid state of matter in which atoms or molecules are free to move past each other • Gas • Liquid

  9. PHET!

  10. Which has the greatest KE? • Which has the most motion? • ALSO, if there is an increase in Temperature… • Speed of particles increases

  11. Water • Water has special properties because of its molecular shape and polarity • Our next lab will be about water! • Balloon Demo

  12. Hydrogen bonds • Oxygen is bonded to 2 Hydrogens in a water molecule • Each water molecule is attracted to other water molecules because of intermolecular forces (+-) • Drawing

  13. Properties of Water • Cohesion: Water sticks to itself easily • Adhesion: Water sticks very well to other things • Example: Graduated cylinders

  14. Properties of water • Surface tension • The tendency of the surface of a liquid to resist an external force • Cohesion • Capillary action • Ability of a liquid to flow in narrow spaces in opposition to external forces (gravity) • Adhesion

  15. Water Strider! • Video

  16. Buoyant Force • The upward force a liquid exerts on matter • Objects less dense than liquid will float • Ice in water!

  17. Archimedes’ Principle • The buoyant force on an object in a fluid is an upward force that is equal to the weight of the liquid that the object displaces

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