what are the physical properties of matter? journal work how would you group these items?
TRANSCRIPT
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What are the physical properties of matter?
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Journal Work
How would you group these items?
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Physical Properties
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Physical properties are used to observe or describe characteristics of matter.
Physical Properties
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Physical Properties
• How does it look? … Red? Blue? Shiny? Reflective? Dull?• What is it made of? … wood? Glass? • How does it feel? … Pointy? Soft?
Fuzzy?• How does it smell? … Sweet? Rotten?
Minty?
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Physical Properties
Physical properties DO NOT change the structure of the matter when it is observed or described.
Structure refers to how the atoms are put together.
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Physical Properties
Properties that can be observed or measured without changing the chemical nature of the matter:• color• size• shape• smell• mass
• volume• density• solubility• boiling point• melting point• freezing point
our standard will focus
on these physical
properties
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Physical Properties:
Volume
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Physical Properties: Volume
Volume is the amount of space that an object takes up.
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Volume is the amount of space that an object takes up.
All matter has mass and volume!
Physical Properties: Volume
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Physical Properties:
Density
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Physical Properties: Density
If you pick up a baseball and a tennis ball, which one would feel heavier?
Even though they are both of similar size, the baseball will feel heavier because it is denser.
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Density is how we measure how much matter is in a given amount of space.
But what
does this
really
mean? How packed together the matter is in an object
Physical Properties: Density
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Density is the relationship between the mass of a substance and the volume of the substance.
Physical Properties: Density
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Less dense
More dense
Same size box, different amount of matter
Which is more dense?
Physical Properties: Density
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More dense
Less dense
Same amount of matter, different size box
Which is more dense?
Physical Properties: Density
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Density = Mass ÷ Volume
If a block of substance A has a mass of 54 kg and a volume of 9 feet
3
… then what is its density?
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Density = Mass ÷ Volume
If a block of substance A has a mass of 200 kg and a volume of 50 feet
3
… then what is its density?
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Density = Mass ÷ Volume
If a block of substance B has a mass of 700 kg and a volume of 14 feet
3
… then what is its density?
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Density = Mass ÷ Volume
I have 3 blocks that are equal in size, but are made of different substances.
Block A has a mass of 280kg and a volume of 10m3
Block B has a mass of 500kg and a volume of 30m3
Block A has a mass of 100kg and a volume of 4m3
Which Block has the greatest Mass? Volume? Density?
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Physical Properties:
Solubility
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Solubility means the amount of a substance that can be dissolved in another substance.
How much sugar can dissolve in water?
solute solvent(water is the most common solvent)
*Temperature affects solubility
Physical Properties: Solubility
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Physical Properties: Solubility
Solvent: the part of a solution that does the dissolving
Solute: the part of a solution that gets dissolved________
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Physical Properties: Solubility
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Physical Properties: Solubility
Solution: a homogenous combination of two or more substances
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A Solution is a mixture of 2 or more substances, where one substance dissolves in the other, and cannot be physically separated.
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Physical Properties: Solubility
Mixture: a heterogeneous combination of two or more substances that keep their properties
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Theses are examples of MIXTURES
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Chicken Noodle Soup is a Mixture
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A Mixture is a combination of 2 or more substances that are not
chemically united.Mixtures can be separated into
different, pure particles.
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Physical Properties:
Boiling Point
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Physical Properties
Boiling Point – the temperature at which a substance turns from a liquid to a gas
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Physical Properties
Boiling PointWhen a liquid becomes a gas it is called boiling or vaporization. At a certain temperature called the boiling point, the molecules will gain enough energy to break free and become a gas.
The boiling point for water is 100 degrees C (212 degrees F).
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Physical Properties:
Melting Point
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Physical Properties
Melting Point – the temperature at which a substance turns from a solid into a liquid
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Physical Properties
Melting PointWhen a solid turns into a liquid it is called melting. There is a temperature at which this happens called the melting point. As the energy in the molecules increases from a rise in temperature, the molecules start moving faster. Soon they have enough energy to break free of their rigid structure and start moving around more easily. The matter becomes a liquid.
The melting point for water is 0 degrees C (32 degrees F).
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Physical Properties:
Freezing Point
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Physical Properties
Freezing Point – the temperature at which a substance turns from a liquid to a solid
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Physical Properties
Freezing PointWhen a liquid turns into a solid it is called freezing. There is a temperature at which this happens called the freezing point. As the energy in the molecules decreases from a fall in temperature, the molecules start moving slower. Soon they don’t have enough energy to move easily and they are confined to a rigid structure. The matter becomes a solid.
The freezing point for water is 0 degrees C (32 degrees F).
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Physical Properties
The temperature of a substances freezing point and the temperature of a substances melting point are the same temperature!
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Physical Properties
Turns from liquid into a solidTurns from a solid into a liquid Turns from liquid into gas
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Journal Work
Explain why wood floats in water, but a rock sinks.
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What are the chemical properties of matter?
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Chemical Properties
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Chemical Properties
Chemical properties tell you the types of changes the matter can undergo.
• Flammability (Does it burn?)• Oxidation (Does Oxygen change it?)• Toxicity (Is it poisonous?)• Sensitivity to Light• Reactivity with water
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Chemical Properties
Chemical properties describe a change in structure.
The substance is forever changed, it can not be changed back.
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Chemical Properties: Flammability
Flammability: The ability to catch fire!
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Chemical Properties: Oxidation
Oxidation: The ability to react with oxygen
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Chemical Properties: Toxicity
Toxicity: the ability to be poisonous
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Chemical Properties: Sensitivity to Light
Sensitivity to Light: the ability to change when exposed to light
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Chemical Properties: Reactivity to Water
Reactivity to water: the ability to change when exposed to water
– Some elements react explosively with water!
– Sodium, Potassium, Lithium, and Calciumhttps://www.youtube.com/w
atch?v=HvVUtpdK7xw
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Physical & Chemical Properties of a Substance.
Different ____________ have different _________(or characteristics) which we use to identify them.
Some of these are called __________ Properties, and some of these are called ____________ Properties.
Can be measured without changing the chemical properties
Cannot be measured without changing the chemical properties
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Physical & Chemical Properties of a Substance.
Different ____________ have different _________(or characteristics) which we use to identify them.
Some of these are called __________ Properties, and some of these are called ____________ Properties.
Can be measured without changing the chemical properties
Cannot be measured without changing the chemical properties
substances properties
PhysicalChemical
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Physical vs. Chemical PropertiesPhysical Chemical
Color Taste Heat of combustionSize Smell Flammability
Shape State Oxidation* Boiling Point * Freezing
PointReactivity
* Density *Melting Point Sensitivity to light
* Solubility *Volume RadioactivityMagnetism Malleability Toxicity
Can be measured without changing the chemical
make-up of the substance
Can only be measured by changing the chemical make-
up of the substance
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Mini Assessment
I have students copy the table on slide 188 into their notes and fill in the correct answers.
Beneath this they number their paper 1 through 3 and answer the multiple choice questions starting on slide 190
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Physical Properties Chemical Properties
Describe…
Change the structure of matter?
Examples include…
yes characteristics of a substance
shape, phase of matter, volume, density, boiling point, mass,
solubility
how one substance reacts with another substance
no flammability, oxidation, toxicity, reactivity to water
A B C
D E F
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Physical Properties Chemical Properties
Describe…
Change the structure of matter?
Examples include…
how one substance reacts with another substance
shape, phase of matter, volume, density, boiling point, mass, solubility
flammability, oxidation, toxicity, reactivity to water
A
B
C
D
E
F
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#1This chart gives the physical properties of matter.
How does the density of a 4-g sample of copper compare to that of a 12-g sampleof copper?
A Its density is one-half the density of the 12-g sample.B Its density is the same density as the 12-g sample.C Its density is twice the density of the 12-g sample.D Its density is three times the density of the 12-g sample.
Element Density Melting Point Boiling PointCopper 8.96 g/cm3 1,084° 2,560°C
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#1This chart gives the physical properties of matter.
How does the density of a 4-g sample of copper compare to that of a 12-g sampleof copper?
A Its density is one-half the density of the 12-g sample.
B Its density is the same density as the 12-g sample.C Its density is twice the density of the 12-g sample.D Its density is three times the density of the 12-g sample.
Element Density Melting Point Boiling PointCopper 8.96 g/cm3 1,084° 2,560°C
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#2
Which is true for every atom of an element?
A It can be seen with a magnifying glass.B It is joined together with another atom.C It has mass and volume.D It is weightless.
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#2
Which is true for every atom of an element?
A It can be seen with a magnifying glass.B It is joined together with another atom.
C It has mass and volume.D It is weightless.
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#3A student has two pieces of aluminum foil. Each piece can be folded and rolled into a wire. Why do both pieces of aluminum foil behave the same way?
A They are composed of the same types of atoms.B They are composed of different types of atoms.C They have the same physical properties, but
different chemical properties.D They have the same chemical properties, but
different physical properties.
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#3A student has two pieces of aluminum foil. Each piece can be folded and rolled into a wire. Why do both pieces of aluminum foil behave the same way?
A They are composed of the same types of atoms.B They are composed of different types of atoms.C They have the same physical properties, but
different chemical properties.D They have the same chemical properties, but
different physical properties.
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What types of changes can matter undergo?
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Matter can change phases permanently or temporarily.
• Temporary changes are called PHYSICAL changes.
• Permanent changes are called CHEMICAL changes.