10.15.13 Physical Vs Chemical Foldable for chemi… · 10/07/13 Unit 4 Vocabulary 10/08/13...
Transcript of 10.15.13 Physical Vs Chemical Foldable for chemi… · 10/07/13 Unit 4 Vocabulary 10/08/13...
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10.15.13 Physical Vs Chemical Foldable
S
OBJ: We will be able to differentiate between chemical and physical changes in matter by creating a foldable.
Identify the elements and
number of atoms that
make up lactose (milk
sugar) C12H22O11.
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Table of Contents
Date Lecture/ Activity/ Lab Page(s)
10/07/13 Unit 4 Vocabulary
10/08/13 EduSmart: Elements & Compounds
10/09/13 Element or Compound Lab
10/10/13 Compounds Reading
10/15/13 Physical Vs Chemical Foldable
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Matter and energy. The student knows the differences between elements and compounds.
The student is expected to:
• (C) Differentiate between elements and compounds on the most basic level.
• (D) Identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change.
Read the standard.
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P Video on Chemical vs Physical Changes
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A:
Ch
em
ical Vs. P
hysical
Physical Property
Evidence of Physical Change
Chemical Property
Evidence of Chemical Change
Foldable
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Did you know?
• Matter is changing around you all
the time. Some changes are
physical and some are chemical
A physical property can be observed
without changing the substance into
something else.
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Do you remember what
Physical Properties are???
• Color
• Shape
• Mass
• Volume
• State of Matter
• Length
• Magnetism
• Texture
• Density
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Physical Change
• A physical change is a type of change in which the form of matter is altered but no new substance is made.
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• A new substance is NOT created
• You can get back what you had before
Water Water
Evidence of Physical Change A:
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What does this mean?
• Only one substance goes into the
reaction and one substance comes out.
Water Water
Evidence of Physical Change
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Cutting a Steak
Steak
Steak
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What physical property changed?
– Size, shape, mass, volume
• Is it still the same substance?
– This is a physical change because before
and after being cut the substance is still
steak even if the size, shape, and other
physical properties changed
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Bending Metal Wires
Metal wires
Metal wires
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What physical property changed?
• What physical property changed?
– Shape
• Why is this a physical change?
– Bending metal wires is a physical change
because a physical change means that no new
substance is produced.
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Ice Cream Melting
Ice cream
Ice cream
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What physical property changed? • State of matter
– Solid Liquid
• Is it still the same substance?
– This is a physical change. The only thing that
changed about the ice cream is its state of
matter (solid to a liquid) but it is still ice cream after it melts.
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Chemical Property
• The ability of matter to change into new matter with different properties.
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What is the evidence of Chemical Changes?
Both the shape and the chemical composition (type of matter) change.
Indicators of chemical changes:
• Color changes
• Odor changes
• Light
• Heat
• Sound
• A gas or solid forms
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Examples of Chemical Change
Burning Wood
Cooking an egg
Rusting iron
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C You are making breakfast for your picky friend Susie. You scramble some eggs for her, but she asks if you can take them back to the kitchen and make them hard boiled.
What scientific reason can
you give Susie for not
changing eggs?
E Did a chemical change or a physical change cause this can to change?
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10.17.13 Foil Lab OBJ: We will identify chemical changes using evidence from our lab.
S Is this chemical
change or a physical change. JUSTIFY your answer.
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Table of Contents
Date Lecture/ Activity/ Lab Page(s)
10/07/13 Unit 4 Vocabulary
10/08/13 EduSmart: Elements & Compounds
10/09/13 Element or Compound Lab
10/10/13 Compounds Reading
10/15/13 Physical Vs Chemical Foldable
10/17/13 Foil Lab
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Title: Foil Lab
Purpose: We will identify if a chemical change has occurred when we combined foil and easy off.
Research:
1. What is a chemical property?
2. What is a physical property?
3. What evidence is there if a chemical change has occurred?
P
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Hypothesis: If we combined foil and easy off then we will see a __________ change, because we will see _________ happen.
A
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Procedures:
Record the physical properties you can observe about easy off and foil
C
Foil Easy off
Physical properties observation before the reaction
Observation during the reaction
Physical properties after the reaction
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The Scientific Method (with MR. HOMER)
Materials What materials will we need for the experiment?
Research Do some background research first. What do you already know?
Hypothesis What are we going to test? What results do we expect?
Operational procedures Step by step instructions on how to do the lab.
Measure The actual experiment!
Evaluate What results did we get?
Reflect Do they validate our hypothesis? Do we need to revise it?
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Look back at your hypothesis. EXPLAIN if your hypothesis is valid or invalid.
Ex: My hypothesis is ______ because when we combined foil and easy-off a ___________ occurs, because ___________, ____________, __________, and _____________are evidence of a ______ change.
E
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10.17.13 The Milk Lab OBJ: We will identify chemical changes using evidence from our lab.
S In this picture name one physical
change and one chemical change:
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Table of Contents
Date Lecture/ Activity/ Lab Page(s)
10/07/13 Unit 4 Vocabulary
10/08/13 EduSmart: Elements & Compounds
10/09/13 Element or Compound Lab
10/10/13 Compounds Reading
10/15/13 Physical Vs Chemical Foldable
10/16/13 Foil Lab
10/17/13 The Milk Lab
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P- Create a T-Chart in journal and list the following items where they belong.
Physical Change Chemical Change
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Mowing the Lawn
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Fireworks
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Slicing Bread
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Roasting Marshmallows
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Ice Melting
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Glass Breaking
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Baking a Cake
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Rusty Nail
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Cracking eggs
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Lighting a Match
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Digesting Food
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Boiling Water
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Toast
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Frying Eggs
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Fresh Lemonade
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Physical Change Chemical Change
Fresh Lemonade Boling Water Cracking Eggs Glass Breaking Ice Melting Slicing Bread Mowing the Lawn
Frying Eggs Fireworks Toast Digesting Food Lighting a Match Rusting Nail Baking a Cake Roasting Marshmallows
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A Title: Sour Milk
Purpose: Is it possible to use chemistry to change regular whole milk into sour milk?
Research:
1. A new solid forms is evidence of _______ change
Materials: milk, vinegar, beaker, eye dropper and safety goggles
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Hypothesis: If we combined milk and vinegar then we will see a __________ change, because we will see _________.
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The Scientific Method (with MR. HOMER)
Materials What materials will we need for the experiment?
Research Do some background research first. What do you already know?
Hypothesis What are we going to test? What results do we expect?
Operational procedures Step by step instructions on how to do the lab.
Measure The actual experiment!
Evaluate What results did we get?
Reflect Do they validate our hypothesis? Do we need to revise it?
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• Milk and Vinegar
– Add 30 drops of milk in the cup.
– Add 35 drops of vinegar.
• Wait about 1 – 2 minutes.
Lab Procedure
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C- Write and draw what you see.
E- Look back at your hypothesis. EXPLAIN if
your hypothesis is valid or invalid.
What type of reaction did you create today.
How do you know?
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What happens to an element when it becomes part of a compound?
S
Venn Diagram: Elements and Compounds
10.18.13
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Table of Contents
Date Lecture/ Activity/ Lab Page(s)
10/07/13 Unit 4 Vocabulary
10/08/13 EduSmart: Elements & Compounds
10/09/13 Element or Compound Lab
10/10/13 Compounds Reading
10/15/13 Physical Vs Chemical Foldable
10/16/13 Foil Lab
10/17/13 The Milk Lab
10/18/13 Venn Diagram: Elements and Compounds
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Challenge #1
Image made with http://www.wordle.net/ T. Trimpe 2008 http://sciencespot.net/
P
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What is it? Rearrange the symbols for the elements
and use the clues provided to figure out the words.
Example: Something to follow Thorium + Protactinium
1. You’ll want to be first!
Cerium + Radium
2. Masked bandit
Nitrogen + Cobalt + Radium + Oxygen
3. Not anybody
Oxygen + Boron + Dysprosium + Nitrogen + Oxygen
4. Beware of this snake!
Oxygen + Carbon + Boron + Radium
Th + Pa
PATH
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The answers are …
1. You’ll want to be first!
Cerium + Radium
2. Masked bandit
Nitrogen + Cobalt + Radium + Oxygen
3. Not anybody
Oxygen + Boron + Dysprosium + Nitrogen + Oxygen
4. Beware of this snake!
Oxygen + Carbon + Boron + Radium
Ce + Ra RACE
N + Co + Ra + O
RACOON
O + B + Dy + N + O
NOBODY
O + C + B + Ra COBRA
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Quick Lab: Lab Procedures
One liquid is water and one is hydrogen peroxide. If you are
familiar with peroxide, you will know that it will bubble if
placed on a cut. Water will not. It is not proper lab procedure
to experiment on your body. You may not taste or place the
liquids on your skin. You may not experiment on any person.
You have 3 minutes to try to figure
out a way to tell these liquids apart.
Write what procedure you used to identify
each.
A
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Elements Compounds
C Create Venn Diagram in Journal
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Using your notes…
Place each in appropriate spot on diagram
Made from just one element
Made from more than one element
Formed through a chemical reaction
Found on periodic table
Essential for life
Found on Earth
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E
Physical or Chemical change? Explain.
1. A tire is inflated with air.
2. Eggs turn into an omelet.