Physical

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Physical Chemical Properties and Changes

• Messana

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BIG IDEA

• Every element on the Periodic Table has its own
  set of physical chemical properties, that is
  what makes their personalities unique!!!

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Property
If struck by lighting, the tree could catch FIRE
(BURN)

• Is a description of an object

The tree is GREEN
The tree is TALL
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What is a Physical Property?

• A characteristic of an element or substance that
  can be observed or measured without changing its
  identity or its structure

• Use your 5 senses OR scientific measurements to
  describe or measure

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Physical Properties
five

• Are determined by the use of the .
• They are a of an object.

senses
description
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Examples of Physical Properties
Color
Smell
Taste
Hardness
State of Matter
Boiling, Freezing, or Melting Point
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Examples of Physical Properties
Density
Mass
Volume
Malleability (the ability to be molded)
Solubility (the ability to be dissolved)
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What is a Physical Change?

• A change that takes place without changing the
  identity or structure of the element or
  substance

• EXAMPLES
• Dissolving
• Phase change (change between solid, liquid, or
  gas)
• Changing shape

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Examples of Physical Changes

• Change in size, shape, or color
• Pencil shavings
• Torn Paper
• Crushed ice
• Sugar dissolved in water
• Painting a wall

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VOCABULARY for INQUIRY STATIONS

• Solubility
• Melting Point
• Boiling Point
• Magnetism
• Conductivity
• Malleability
• Density

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LETS VISIT SOME STATIONS! ?

• Directions Please go to assigned station and
  using the STATION VOCAB please decide which
  PHYSICAL PROPERTY represents the station and
  complete your PHYSICAL PROPERTY CHART
  QUESTIONS!
• LETS DO THIS LIL DARLINGS!! ?

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VOCABULARYEXAMPLES OF PHYSICAL PROPERTIES
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• DENSITY

• Mass per volume of a material, or how much stuff
  is packed together in an area.

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• A measure of how much of a substance dissolves in
  a given amount of another substance.

• SOLUBILITY

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• MELTING POINT

• The temperature at which a solid changes to a
  liquid.

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• MAGNETISM

• A force of attraction or repulsion that exists
  between like and unlike poles.

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• The ability to be hammered, shaped, or rolled
  into thing sheets. Most metals are malleable.

• MALLEABILITY

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• CONDUCTIVTY

• The ability of a material or substance that
  allows electricity or heat to flow through it
  easily. Most metals are good conductors.

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• BOILING POINT

• The temperature at which a liquid changes to a
  gas.

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• SPECIFIC HEAT

• The amount of heat or energy needed to raise 1
  gram of a substance by 1 degree Celsius (1?C).

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What is a Chemical Property?

• A characteristic that gives a substance the
  ability to change into a new substanceBUT the
  chemical change has to be happening to see the
  chemical properties!

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What is a Chemical Change?

• A change that results in the production of a new
  substance and cannot be reversed.

• EXAMPLES
• Burning
• Rusting
• Cooking

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Evidence of a Chemical Change/Reaction

• Color changes (color appears or disappears)
• Temperature changes
• Gas/gas bubbles produced
• Fire/explosion
• Precipitate is formed a solid forms out of 2
  liquids

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Examples of Reactivity

• Metals Reacting to Being Burned
• http//www.youtube.com/watch?vd8hpUtRnsYc

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Physical Vs. Chemical Foldable

• Match each word in the word in the word bank with
  the correct definition
• Then, decide whether each pair represents a
  physical or chemical property and put them on the
  correct side of your foldable under Examples of
  Physical Properties or Examples of Chemical
  Properties
• Hint There are 8 Physical examples 4 Chemical
  examplesCHECK BEFORE YOU PASTE!

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VOCABULARYEXAMPLES OF CHEMICAL PROPERTIES
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• CHEMICAL REACTIVITY

• The ability of a material or substance to react
  with another material or substance and form
  something entirely new or different.

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• TOXICITY

• The degree to which a chemical can harm an
  organism.

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• FLAMMABILITY

• The ability of a material or substance to burn or
  start on fire easily.

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• REACTIVITY WITH OXYGEN

• The ability of a material or substance (usually
  metals) to react with oxygen and cause them to
  rust, tarnish, or combust, spark or create a
  flame or light.

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Property or Change?

• THINK, GROUP, SHARE
• Explain the difference between a property and a
  change.

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Physical or Chemical?

• THINK, GROUP, SHARE
• Explain how you know the difference between a
  physical change and chemical change?
• What were those 5 helpful hints that I gave you
  to identify a chemical change?

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What were the 5 Things that give you a hint that
a chemical change/reaction has occurred?

• Color changes (color appears or disappears)
• Temperature changes
• Gas/gas bubbles produced
• Fire/explosion/flame/light produced
• Precipitate is formed a solid forms out of 2
  liquids

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Mini Labs Demos

• Labs to Examine Chemical Changes

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Mini Lab 1

• Make your prediction based on the items you see
  the teacher has
• Watch closelykeep watching!
• Write your observations
• What was your hint that a chemical change
  occurred?

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FRIENDLY REMINDERS!!

• Anyone sensitive to strong odors? Let me know
  if any of the odors are bothering you at any
  point during the labs today!
• Absolutely none of the lab chemicals should
  come in contact with your mouth, eyes, or be
  breathed deeply!!
• GROUP 1 SINK 1
• GROUP 2 SINK 2
• GROUP 3 SINK 3 ETC
• GROUP 7 8 SHARE A SINK
• USE YOUR PLASTIC BIN TO CATCH ANY SPILLS, FOR
  EXAMPLE WHEN YOU POUR VINEGAR INTO YOUR GRADUATED
  CYLINDER DO IT OVER THE BIN!

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• Group Roles
• Leader Reads the directions for each lab, keeps
  group on task and following directions
• Materials/Clean Up collects, returns, cleans and
  disposes of materials
• Data Discussion Leader Ensures there is a
  conversation about each data table to share
  information.
• Quality Management Ensures every student has
  detailed quality answers written in complete
  sentences using scientific language turns their
  lab guide in!

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Mini Lab 2

• Send your materials person to get a cup of milk
  and a cup of vinegar, and a stir stick
• Pour the milk into the vinegar and stir it like
  you mean it!
• Observe and record any changes that occur at this
  time.
• Let this one sit on your table to see if there is
  any change by the time class ends.

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Mini Lab 3

• Send your materials person up to pick up a ziploc
  bag with baking soda in it for each group
• Use the graduated cylinder to measure about
• 30 mL of vinegar
• Add the 30 mL of vinegar to the baking soda in
  the bag and SEAL THE BAG IMMEDIATELY
• Observe and record any changes that occur.
• Rinse your GRADUATED CYLINDER and throw away the
  ziplock bag ONCE YOU HAVE DUMPED THE CONTENTS
  DOWN THE DRAIN

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Mini Lab 4

• Send your materials person up to get a MYSTERY
  test tube for each group member
• Use the eyedroppers to add an eyedropper full of
  the cabbage juice (purple liquid) to each test
  tubeDO THIS ONLY ONCE
• Observe and record any changes that occur
• WAIT FOR FURTHER INSTRUCTIONS!!!
• Rinse your test tubes and return it to the test
  tube rack. Flush your eyedroppers with water.
  Rinse your bin dry it! Clean up any spills at
  your group!

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Mini Lab 5

• Send your materials person to the sink to get
  approximately 5 ml of water in your graduated
  cylinder
• Put the water into your film canister close the
  lid!
• Break one Alka-Seltzer tablet in half and hold it
  up in the air!
• ONCE WE ARE OUTSIDE
• Put the Alka-Seltzer tablet into the film
  canister and snap the lid TIGHTLY
• QUICKLY put the canister on the ground CAP SIDE
  DOWN AND STEP BACK!

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Your lab station should be clean and your bin
should contain all of the supplies it did when
you started!

• Clean, dry plastic bin
• 1 graduated cylinder
• 1 bottle of vinegar
• 1 small beaker of cabbage juice
• 2 pipettes (eyedroppers)
• 1 packet of Alka-Seltzer
• 1 film canister
• What about the milk vinegar?

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Something to try at home ?

• http//www.youtube.com/watch?vVFvik_THcNQ
• Check for changes in Mini Lab 2 then pour your
  new substance down the drain and throw the cups
  and stir stick in the trash.

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Lets Take a Look at the Lab

• Quality Management Ensures every student has
  detailed quality answers written in complete
  sentences using scientific language turns their
  lab guide in!
• Stop using the word it what is it? use the
  vocabulary/explain with detail
• SOME COMMON ERRORS
• The 2 liquids, the milk and the vinegar, formed a
  precipitateinstead of it precipitated/it was
  precipitating what does that mean?
• Is dissolving chemical or physical?

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Lets Take a Look at the Lab

• Question 2 on the back some examples of good
  answers were
• In the beginning we didnt know what would happen
  in Mini Lab 2, but it greatly displayed how this
  relationship between properties and changes
  because you had to mix the milk and vinegar
  together before their properties could react and
  cause them to form a precipitate which was the
  chemical change.
• For experiment 4, we had to pour the cabbage
  juice into the mystery liquid to see it undergo
  the color change. The color couldnt change
  without mixing the two liquids allowing you to
  see the chemical property through the chemical
  change.

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Physical Vs. Chemical Change Examples

• From the lab guide
• From the homework

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Whiteboard Quiz Physical or Chemical?

• Number your whiteboard 1-10
• You must get at least 9 correct to get a ticket

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1. Physical or Chemical?

• Freezing water

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2. Physical or Chemical?

• Chopping Wood

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3. Physical or Chemical?

• Dissolving salt in water

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4. Physical or Chemical?

• Crumpled paper

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5. Physical or Chemical?

• Burning Wood

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6. Physical or Chemical?

• Melting Gold

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7. Physical or Chemical?

• Dying Easter eggs

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8. Physical or Chemical?

• Boiling Water

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9. Physical or Chemical?

• Frying chicken

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10. Physical or Chemical?

• Tarnish on the Statue of Liberty

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Whiteboard Quiz Part 2 Which Property?

• Number your whiteboard 1-10
• You must get at least 8 correct to get a ticket

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1. Which Property?

• The temperature at which a liquid changes to a
  gas.

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2. Which Property?

• Mass per volume of a material, or how much stuff
  is packed together in an area.

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3. Which Property?

• The ability to be hammered, shaped, or rolled
  into thin sheets. Most metals have this quality.
  

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4. Which Property?

• The ability to start on fire or to burn.

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5. Which Property?

• The amount of heat or energy needed to raise 1
  gram of a substance by 1 degree Celsius (1?C).

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6. Which Property?

• A measure of how much of a substance dissolves in
  a given amount of another substance.

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7. Which Property?

• The temperature at which a solid changes to a
  liquid.

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8. Which Property?

• The ability of a material or substance to react
  with another material or substance and form
  something entirely new or different.

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9. Which Property?

• The ability of a material or substance that
  allows electricity or heat to flow through it
  easily. Most metals have this property.

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10. Which Property?

• The degree to which a chemical can harm an
  organism.

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Mythbusters Episode

• Fill in the video guide for a quiz grade!!

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STUDY JAMS Extra Review

• www.studyjams.com
• Physical Chemical Changes of Matter