Homework make flashcards for the following terms:

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Homework- make flashcards for the following terms

• 1. Solid 2. Liquid 3. Gas 4. Plasma
  5. Thermal expansion 6. Phase change
  7. Melting 8. Freezing 9. Sublimation
  10. Vaporization

• 11. Evaporation 12. Condensation 13. Heat of
  fusion 14. Heat of vaporization 15. Freezing
  point 16. Melting point 17. Boiling
  point18. Crystal 19. Fluid 20. Viscosity

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Chemistry is the study of matter and how it
changes and interacts with other matter.
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Essential question What do we understand about
the phases of matter?
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Matter is known to exist in 4 phases
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Defining states of matter according to particle
motion

• Solid particles have the least amount of energy.
  Their motion is so weak that the particle cannot
  push other particles out of the way. Because of
  this the particles of a solid are packed close
  together and the motion seems to be a vibration.

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Defining states of matter according to particle
motion

• Liquid particles have enough energy to push other
  particles out of the way. When the particles of a
  liquid bump into each other, they push the
  particles farther apart and move past them. This
  causes the "flow" of a liquid.

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Defining states of matter according to particle
motion

• Gas particles have a high amount of energy. The
  particles collide with enough force to push the
  particles so far apart that they escape the
  attraction of the surrounding particles. Gas
  particles have the most energy of any "regular"
  phase of matter. These particles will naturally
  move from an area of high concentration to an
  area of low concentration, diffusion.

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Defining states of matter according to particle
motion

• Plasma particles have extremely large amounts of
  energy. The collisions in a plasma are so violent
  that electrons are knocked away from their atoms.
  Plasma can be thought of as a gas consisting of
  positive ions and electrons instead of atoms.

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Describe Solids Liquids

• What can we do to tell them apart?
• What is something that is different in every
  solid and every liquid?
• How can you test it?

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Oobleck

• Make oobleck
• Make observations what does it feel like? Write
  this in your journal.

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Oobleck

• Make the following tests and write what happens
  in your science journal
• Slowly poke your finger into oobleck
• Quickly poke your finger into oobleck
• Pour oobleck into baggie does it pour? Does it
  take the shape of the bag?
• Roll the oobleck into a ball
• Tap the oobleck with a pencil.
• Bounce the oobleck on your desk (not floor!)

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Phase Change

• The physical change of matter from one phase to
  another. A phase change takes place because the
  particles of a substance gain or lose energy,
  causing them to change their motion.

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7 Possible Phase Changes

• Condensation - gas to liquid
• Freezing - liquid changes to solid
• Sublimation - solid changes to gas
• Melting - solid changes to liquid
• Vaporization - liquid changes to gas
• Snow gas changes to solid
• Evaporation - vaporization that takes place at
  the surface of a liquid.

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Every pure substance has a

• Freezing point temperature - the temperature at
  which a liquid changes to a solid.
• Melting point temperature - the temperature at
  which a solid changes to a liquid.
• Boiling point temperature - the temperature at
  which a liquid boils.

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Fluid

• Any substance that flows. Liquids and gases are
  fluids

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Viscosity

• The resistance of a fluid to flow
• Water has a low viscosity.
• Honey has a high viscosity.