RETEST: Friday, before

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Vocabulary Set 1belement ion metal nonmetal met
alloid nucleus electron cloud
Homework Vocab set 1b Descriptions images

• RETEST Friday, before after school

Date Session Activity Page
9/23-24 9 Chemical Change Lab 15

9/25-26 10 Chemical Properties Chemical Changes 16
Chemical/Physical Stations 17
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• 8.P.1 Understand the physical properties of
  matter and changes that occur when matter
  interacts in an open or closed container
• 8.P.1.3 Compare physical changes such as size,
  shape and change of state to chemical changes
  that are a result of a chemical reaction to
  include changes in temperature, color, gas or
  formation of a precipitate.

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Objective

• TLW compare physical and chemical changes and
  properties by completing a note sheet, completing
  stations, white board activity and quick write.

4
Chemical Property

• Properties that change the chemical nature of
  matter.chemical properties are only observed or
  measured in a chemical reaction

5
Chemical Properties

• pH
• Reactivity
• Combustion/flammability
• Tarnish
• Corrosion
• Rusting

6
pH

• A measurement of how acidic (1-6) or basic (8-14)
  a material is

7
Reactivity

• How easily a substance reacts with other
  substances. (how easily it undergoes a chemical
  change) http//www.youtube.com/watch?v9bAhCHedVB4
  

8
Combustion/flammability

• Burning with oxygen.
• Reactant Oxygen ----gt Oxide(s) heat

9
Corrosion

• The gradual destruction of materials (usually
  metals) by chemical reaction with their
  environment.

10
Rusting

• Creation of Iron oxide. Iron forms Iron oxide
  (rust) reacts with oxygen and water.

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Tarnish

• A thin layer of corrosion that forms over some
  metals. It only affects the outermost layer of
  the material. The layer of tarnish seals and
  protects the underlying layers from reacting.

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PHYSICAL VS CHEMICAL
Same substance at the end Different substance at the end
Easily Reversed Difficult to Reverse..Requires another chemical reaction to reverse
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Stations . Quick
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PHYSICAL or CHEMICAL???YOU Decide ?

• Using your white board, please write
• P for Physical OR C FOR cHEMICAL

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(No Transcript)
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CHEMICAL

• EXOTHERMIC..
• RELEASES ENERGY

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CHEWING GUM
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CHEMICAL PHYSICAL

• Enzymes in saliva breaking down some chemicals in
  the gum chemical
• Changing the shape of the gum while you chew it
  physical

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Breaking a stick
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PHYSICAL

• NO CHEMICAL BONDS HAVE BEEN BROKEN.
• THE MATERIAL IS THE SAME AT THE END OF THE CHANGE
  AS IT WAS AT THE BEGINNING

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Boiling Water
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PHYSICAL

• THIS IS A PHASE CHANGE (CHANGE OF STATE)
• LIQUID ? GAS
• AN INCREASE IN THE ENERGY IN THE PARTICLES HAS
  OCCURRED. NO CHEMICAL BONDS BROKEN. WATER VAPOR
  IS STILL WATER.

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Making Kool-Aid
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PHYSICAL

• THIS IS DISSOLVING. THE MATERIALS ARE STILL THE
  SAME. IF YOU EVAPORATE THE WATER, THE SUGAR AND
  THE FOOD COLORING WILL REMAIN.

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DEFLATING A BASKETBALL
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PHYSICAL
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Cellular RESPIRATION
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CHEMICAL

• EXOTHERMIC..
• RELEASES ENERGY

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CLOUD FORMING in the SKY
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PHYSICAL
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EXPLOSION of FIREWORKS
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CHEMICAL

• EXOTHERMIC.
• RELEASES ENERGY

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ROTTING FRUIT
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CHEMICAL
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PULLING COPPER into THIN WIRE
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PHYSICAL
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FRYING AN EGG
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CHEMICAL
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ICE PACK(the kind you crush, chemicals mix, and
it becomes cold)
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chemical

• ENDOTHERMIC .
• ENERGY ABSORBED

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LIGHTNING BUGS
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CHEMICAL

• EXOTHERMIC..
• RELEASES ENERGY

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ABSORPTION OF WATER into a PAPER TOWEL
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PHYSICAL
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DRY ICE sublimation (solid ?gas)
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PHYSICAL

• Solid Carbon Dioxide
• Sublimation (solid to gas)
• Phase change

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DIGESTING FOOD
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CHEMICAL

• EXOTHERMIC.
• RELEASING ENERGY

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PHOTOSYNTHESIS
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CHEMICAL

• ENDOTHERMIC.
• ABSORBS ENERGY

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Page 18

• Complete review sheet
• Ask yourself
• Is it reversible? Y ? physical change
• Have I changed the chemical structure? N ?
  physical change