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Physical

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Physical & Chemical Properties ... Messana – PowerPoint PPT presentation

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Title: Physical


1
Physical Chemical Properties and Changes
  • Messana

2
BIG IDEA
  • Every element on the Periodic Table has its own
    set of physical chemical properties, that is
    what makes their personalities unique!!!

3
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
4
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

5
Physical Properties
five
  • Are determined by the use of the .
  • They are a of an object.

senses
description
6
Examples of Physical Properties
Color
Smell
Taste
Hardness
State of Matter
Boiling, Freezing, or Melting Point
7
Examples of Physical Properties
Density
Mass
Volume
Malleability (the ability to be molded)
Solubility (the ability to be dissolved)
8
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

9
Examples of Physical Changes
  • Change in size, shape, or color
  • Pencil shavings
  • Torn Paper
  • Crushed ice
  • Sugar dissolved in water
  • Painting a wall

10
VOCABULARY for INQUIRY STATIONS
  • Solubility
  • Melting Point
  • Boiling Point
  • Magnetism
  • Conductivity
  • Malleability
  • Density

11
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!! ?

12
VOCABULARY EXAMPLES OF PHYSICAL PROPERTIES
13
  • DENSITY
  • Mass per volume of a material, or how much stuff
    is packed together in an area.

14
  • A measure of how much of a substance dissolves in
    a given amount of another substance.
  • SOLUBILITY

15
  • MELTING POINT
  • The temperature at which a solid changes to a
    liquid.

16
  • MAGNETISM
  • A force of attraction or repulsion that exists
    between like and unlike poles.

17
  • The ability to be hammered, shaped, or rolled
    into thing sheets. Most metals are malleable.
  • MALLEABILITY

18
  • CONDUCTIVTY
  • The ability of a material or substance that
    allows electricity or heat to flow through it
    easily. Most metals are good conductors.

19
  • BOILING POINT
  • The temperature at which a liquid changes to a
    gas.

20
  • SPECIFIC HEAT
  • The amount of heat or energy needed to raise 1
    gram of a substance by 1 degree Celsius (1?C).

21
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!

22
What is a Chemical Change?
  • A change that results in the production of a new
    substance and cannot be reversed.
  • EXAMPLES
  • Burning
  • Rusting
  • Cooking

23
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

24
Examples of Reactivity
  • Metals Reacting to Being Burned
  • http//www.youtube.com/watch?vd8hpUtRnsYc

25
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!

26
VOCABULARY EXAMPLES OF CHEMICAL PROPERTIES
27
  • CHEMICAL REACTIVITY
  • The ability of a material or substance to react
    with another material or substance and form
    something entirely new or different.

28
  • TOXICITY
  • The degree to which a chemical can harm an
    organism.

29
  • FLAMMABILITY
  • The ability of a material or substance to burn or
    start on fire easily.

30
  • 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.

31
Property or Change?
  • THINK, GROUP, SHARE
  • Explain the difference between a property and a
    change.

32
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?

33
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

34
Mini Labs Demos
  • Labs to Examine Chemical Changes

35
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?

36
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!

37
  • 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!

38
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.

39
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

40
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!

41
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!

42
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?

43
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.

44
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?

45
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.

46
Physical Vs. Chemical Change Examples
  • From the lab guide
  • From the homework

47
Whiteboard Quiz Physical or Chemical?
  • Number your whiteboard 1-10
  • You must get at least 9 correct to get a ticket

48
1. Physical or Chemical?
  • Freezing water

49
2. Physical or Chemical?
  • Chopping Wood

50
3. Physical or Chemical?
  • Dissolving salt in water

51
4. Physical or Chemical?
  • Crumpled paper

52
5. Physical or Chemical?
  • Burning Wood

53
6. Physical or Chemical?
  • Melting Gold

54
7. Physical or Chemical?
  • Dying Easter eggs

55
8. Physical or Chemical?
  • Boiling Water

56
9. Physical or Chemical?
  • Frying chicken

57
10. Physical or Chemical?
  • Tarnish on the Statue of Liberty

58
Whiteboard Quiz Part 2 Which Property?
  • Number your whiteboard 1-10
  • You must get at least 8 correct to get a ticket

59
1. Which Property?
  • The temperature at which a liquid changes to a
    gas.

60
2. Which Property?
  • Mass per volume of a material, or how much stuff
    is packed together in an area.

61
3. Which Property?
  • The ability to be hammered, shaped, or rolled
    into thin sheets. Most metals have this quality.

62
4. Which Property?
  • The ability to start on fire or to burn.

63
5. Which Property?
  • The amount of heat or energy needed to raise 1
    gram of a substance by 1 degree Celsius (1?C).

64
6. Which Property?
  • A measure of how much of a substance dissolves in
    a given amount of another substance.

65
7. Which Property?
  • The temperature at which a solid changes to a
    liquid.

66
8. Which Property?
  • The ability of a material or substance to react
    with another material or substance and form
    something entirely new or different.

67
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.

68
10. Which Property?
  • The degree to which a chemical can harm an
    organism.

69
Mythbusters Episode
  • Fill in the video guide for a quiz grade!!

70
STUDY JAMS Extra Review
  • www.studyjams.com
  • Physical Chemical Changes of Matter
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