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HOW DO WE CLASSIFY MATTER?
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Why do we often say WATER is PURE?
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What does pure H2O look like at the super microscopic level?
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What does pure H2O look like at the super microscopic level?
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What does pure H2O look like at the super microscopic level?
All we would see are H2O molecules.
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What about PURE GOLD?
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not that 14 K cheap stuff! What about PURE GOLD?
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It would be made of only Au atoms!
What about PURE GOLD? It would be made of only Au atoms!
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It would be made of only Au atoms!
What about PURE GOLD? It would be made of only Au atoms!
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When something is made of only ONE INGREDIENT, it is called PURE.
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element…
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element…
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element…
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element, one molecule…
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element, one molecule…
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element, one molecule, or one compound molecule.
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element, one molecule, or one compound molecule.
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When something is made of only ONE INGREDIENT, it is called PURE
When something is made of only ONE INGREDIENT, it is called PURE. One element, one molecule, or one compound molecule.
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This is how we classify matter:
draw this
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PURE matter is made of only ONE ingredient (one element, simple molecule, or one compound)
draw this 1 1
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Like PURE H2O or PURE Au
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What if we mix some copper or silver in with our pure gold?
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What if we mix some copper and silver atoms in with our pure gold?
Is our gold PURE anymore?
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Mixing other metals in with a 100% pure sample makes an alloy mixture.
Is our gold PURE anymore? NO!
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Mixing other metals in with a 100% pure sample makes an alloy mixture.
24KT gold is 100% gold, 14KT gold is only 60% gold.
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MIXTURES are MORE THAN ONE INGREDIENT.
draw this 2+ 1 1
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Is BRONZE a pure substance or a mixture?
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Is BRONZE a pure substance or a mixture?
bronze is a mixture of copper & and tin… Cu + Sn
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Is BRONZE a pure substance or a mixture?
bronze is a mixture of copper & and tin… Cu + Sn
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Are we pure substances or mixtures?
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Of course, we are mixtures of countless types of matter.
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Most matter is MIXTURES
draw this 2+ 1 1
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Which one, BRONZE or HUMANS would be considered a HOMOgenous mixture?
2+ 1 1
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Does “homo” mean “of the same” or “two different?”
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HOMOgenous mixtures means SAME-looking throughout:
2+ 1 1
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HOMOgenous mixtures LOOK PURE, BUT are made of a MIX of MORE THAN ONE substance.
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Homogenous mixtures LOOK PURE, BUT are made of a MIX of MORE THAN ONE substance.
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SOLUTIONS like Kool-Aid, bleach or ALLOYS like bronze or 14 KT gold are HOMOGENOUS.
2+ 1 1 Solutions (solutes com- pletely dissolve in solvents) Alloys (smooth, metal mixture
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HETEROGENOUS mixtures definitely LOOK like they are made of more than 1 substance.
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HETEROGENOUS mixtures definitely LOOK like they are made of more than 1 substance.
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HETEROgenous mixtures look DIFFERENT throughout...
2+ 1 1 Solutions (solutes com- pletely dissolve in solvents) Alloys (smooth, metal mixture can see different bits of matter
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Heterogenous mixtures you NEED to SHAKE or STIR before you use are SUSPENSIONS.
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Heterogenous suspensions have particles that settle at the bottom.
2+ 1 1 Solutions (solutes com- pletely dissolve in solvents) Alloys (smooth, metal mixture can see different bits of matter Suspensions (particles settle)
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Got it?? 2+ 1 1 can see different Solutions bits of matter Suspensions
(solutes com- pletely dissolve in solvents) Alloys (smooth, metal mixture can see different bits of matter Suspensions (particles settle)
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classify matter part 2
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MIXTURES are NOT CHEMICALLY COMBINED like compounds.
2+ 1 1 Solutions (solutes com- pletely dissolve in solvents) Alloys (smooth, metal mixture can see different bits of matter Suspensions (particles settle) ONE INGREDIENT ONLY
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SHOW MODELS AND MANIPULATIVES…
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Mixtures are relatively easy to separate compared to pure elements or pure compounds!
HOW DO WE SEPARATE SALT FROM OCEAN WATER SOLUTION? HOW DO WE SEPARATE RED CELLS FROM WHITE CELLS FROM PLASMA IN A BLOOD MIXTURE? HOW DO WE SEPARATE COPPER FROM TIN IN BRONZE ALLOY?
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example of iron, sand and popcorn.
ferromagnetic liquid
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post assessment chem 1
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Cool REVIEW quiz…
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Show examples have students guess…
Peanut butter Dressings Baking soda Rock candy Rock Gypsum crystal Chips Nougat Soda OJ chocolate
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Test for understanding…
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Are the following examples PURE MATTER, or HOMOGENOUS or HETEROGENOUS MIXTURES?
draw this
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BRONZE MASK
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Bronze is a uniform HOMOGENOUS MIXTURE of elements copper (Cu) and tin (Sn)?
draw this bronze
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BEACH SAND
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Beach sand is a HETEROGENOUS MIXTURE of compounds--mostly SiO2 & CaCO3 (shells).
draw this bronze beach sand
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Sand (just sand)
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Pure sand is PURE MATTER of only SiO2 & is used to make clear glass.
draw this bronze beach sand
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Pure sand is a PURE COMPOUND of only SiO2 & is used to make clear glass.
draw this clean sand bronze beach sand
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Ozone found in our upper atmosphere?
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Ozone (O3) is a molecule of a PURE ELEMENT and blocks deadly UV rays from the sun.
draw this clean sand ozone bronze beach sand
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US?
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Humans (in fact anything alive) is a complex HETEROGENOUS MIXTURE.
draw this clean sand ozone bronze beach sand living things
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Baking soda?
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Baking soda is a PURE COMPOUND of sodium bicarbonate (NaHCO3).
draw this clean sand ozone bronze beach sand baking soda (aka sodium bicarbonate) blood living things
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Sulfur?
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Sulfur is number 16 on our periodic table. It is a PURE ELEMENT.
draw this clean sand ozone bronze beach sand baking soda sulfur blood living things
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What about “pure” orange juice?
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“Pure” orange juice is actually a mixture of sugars, water and vitamins.
draw this clean sand ozone bronze beach sand baking soda sulfur blood living things orange juice
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“Pure” orange juice is actually a mixture of sugars, water and vitamins. What about OJ with PULP?
draw this sand ozone bronze beach sand baking soda sulfur blood living things orange juice
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“Pure” orange juice is actually a mixture of sugars, water and vitamins. What about OJ with PULP?
draw this clean sand ozone bronze beach sand baking soda sulfur blood living things orange juice OJ with pulp
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When ____________ dissolve in _____________ we make solutions!
What about SOLUTIONS? When ____________ dissolve in _____________ we make solutions!
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What about SOLUTIONS? When solutes dissolve in
solvents we make solutions!
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SOLUTIONS are homogenous mixtures. (scale dependent)
draw this clean sand ozone bronze beach sand baking soda (aka sodium bicarbonate) blood sulfur living things orange juice OJ with pulp SOLUTIONS
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What about turbid water?
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Turbid water has all sorts of things you can see SUSPENDED in it!
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SUSPENSIONS are one type of heterogenous mixture that settle into layers.
draw this sand bronze beach sand ozone baking soda blood living things sulfur orange juice OJ with pulp SOLUTIONS SUSPENSIONS
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Are you getting the idea?
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Are you getting the idea?
How about wood, your cotton t-shirt, salt water, milk, plastic, our air… Are you getting the idea?
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MOST THINGS ARE MIXTURES--unless they are made of only one ingredient (these are pure)!
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ONE LAST THING!!!
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Mixtures are relatively easy to separate!
illustrate with iron shavings, popcorn kernels and sand.
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Mixtures are relatively easy to separate!
HOW DO WE SEPARATE SUGAR FROM SUGAR WATER? HOW DO WE SEPARATE COPPER FROM TIN IN BRONZE? HOW DO WE SEPARATE SALT FROM OCEAN WATER?
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hand out Part 3 chemistry worksheet.
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