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Is It Matter?. Circle the items that you believe are matter: Table Air Glass Sound Light Sand Write your own definition of what matter is. Is It Matter?. Circle the items that you believe are matter: Table Air Glass Sound Light Sand Now lets fix that definition…. Matter:.

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is it matter
Is It Matter?
  • Circle the items that you believe are matter:
    • Table
    • Air
    • Glass
    • Sound
    • Light
    • Sand
  • Write your own definition of what matter is.
is it matter1
Is It Matter?
  • Circle the items that you believe are matter:
    • Table
    • Air
    • Glass
    • Sound
    • Light
    • Sand
  • Now lets fix that definition…
matter
Matter:
  • Anything that has mass and take up space!
  • Properties of matter can be used to classify it…we will discuss these tomorrow!
unit 1

Unit 1

The Nature of Matter

2011

physical properties
Physical Properties
  • Help to identify a substance
  • Are readily observable
  • Color, hardness, density, boiling point, change of state etc.
physical properties continued
Physical Properties Continued
  • Thermal Conductivity: the rate at which a substance transfers heat
    • Good conductor: metal
    • Poor conductor: Styrofoam
  • State: the physical form in which a substance exists. (solid, liquid, gas or plasma)
  • Solubility: the ability of a substance to dissolve in another substance. (ex. Flavored drink mix in water)
physical properties continued1
Physical Properties Continued

Ductility: the ability of a substance to be pulled into a wire

Malleability: the ability of a substance to be rolled or pounded into thin sheets

physical change
Physical Change
  • Cause changes to physical properties
  • Physical properties will change but the substance or type of matter will remain the SAME!
  • DO NOT result in the formation of a new substance
examples of physical change
Examples of Physical Change
  • If you melt a block of ice, you still have H2O in the end.
  • If you break a bottle you still have glass.
  • Painting a piece of wood will not make it not be wood.
  • Melting, freezing, breaking, condensing, crushing, cutting and bending
chemical properties
Chemical Properties
  • Describe matters ability to change into new matter.
  • Can only be observed if the type of matter is changed
  • Characteristic Property: A property that is always the same no matter the size of the sample. These can be used to identify and classify a substance.
    • Examples: density and magnetism
chemical property examples
Chemical Property Examples
  • Flammability:
    • will the object burn?
  • Reactivity
    • Will to substances react to form a new substance?
difference between physical and chemical properties
Difference between physical and chemical properties?
  • We can observe physical properties without changing the substance. We cannot observe a chemical property without changing the matter involved.
chemical change
Chemical Change
  • A change that matter undergoes when it turns into a NEW substance – elements of the original substance are broken apart and rearranged to form a NEW substance
  • Chemical Changes ALWAYS result in the formation of a NEW substance with different properties than the original substance(s).
  • Chemical Changes are difficult to reverse (think of trying to unbake a cake)
common examples of chemical change
Common Examples of Chemical Change:
  • Burning a log causes a chemical reaction that releases carbon dioxide
  • Placing an alka-seltza in water releases carbon dioxide bubbles
  • Exposing some metals to water and oxygen causes the formation of rust
  • Other processes that include chemical reaction:
      • Digestion
      • Respiration
      • Photosynthesis
      • Decomposition
signs that a chemical change has occurred
Signs that a chemical change has occurred:
  • Change in color
  • Change in odor
  • Production of heat
  • Fizzing
  • Foaming
  • Sound or light being given off
physical or chemical property or change
Physical or Chemical?Property or Change?
  • A bike is left out in the rain and begins to rust
  • A match burns, leaving only a charred stick of wood
  • A copper wire is cut into 5 pieces
  • Flammability
  • An ice cube melts
  • Solubility
  • Gasoline burns in a running car
physical or chemical property or change1
Physical or Chemical?Property or Change?
  • Water boils at 100 degrees Celsius
  • A silver tea set tarnishes over time
  • A water molecule gains enough energy to enter the vapor phase
  • Lemonade powder is soluble in water
  • Food coloring is added to cake icing to make it pink
  • Alka seltzer is put into water and bubbles form
  • NaOH + HCl  NaCl + H2O