Clear your desk except for the Catalyst sheet Write todays date 090810 next to Wednesday When the bell rings answer the Catalyst questions Catalyst 3 Minutes How many picoseconds are in a second ID: 651277
Download Presentation The PPT/PDF document "Do now Grab your catalyst sheet from the..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Do now
Grab your catalyst sheet from the front
Clear your desk except for the Catalyst sheet
Write today’s date (09/08/10) next to Wednesday
When the bell rings, answer the Catalyst questionsSlide2
Catalyst
(3 Minutes)
How many picoseconds are in a second?
How do you convert from
American
length units to metric length units?
What is one way of separating a homogeneous mixture?Slide3
TRADE AND GRADESlide4
Catalyst
How many picoseconds are in a second?
1 s = 10
12
ps
How do you convert from us length units to metric length units?
1 in = 2.54 cm
What is one way of separating a homogeneous mixture?
chromotography
, filtration or distillationSlide5
ORAL DRILL
(3 MINUTES)
?
?
?
?
?
?
?
?
?
?
?Slide6
States of
Matter
Solid –
Liquid –
Gas –
Object has definite shape and definite volume; its particles vibrate in place.
Object has definite volume and takes the shape of the container; it is pourable.
Object has no definite volume and no definite shape; its particles are fast moving making it easily expandable. Slide7
States of matter
SOLID
LIQUID
GASSlide8
Phase changes
Liquid
Melting
Vaporizing
Condensing
Freezing
Solid
Gas
Subliming
DepositingSlide9
Physical
vs
Chemical
PHYSICAL CHANGES
are
changes to matter that
DO NOT
result
in changing the
chemical compositionCHEMICAL CHANGES are changes to matter that DO result in changing the chemical compositionSlide10
Chemical
vs
physical
Rusting
Density
Leaf color
Cheese melting
Water boiling A sidewalk eroding Food coloring being added
Combustibility Burning a piece of paperBLUE: Chemical RED: Physical
PhysicalChemical
PhysicalPhysicalPhysicalPhysical
ChemicalChemical
ChemicalSlide11
Pure Substance
substancesSlide12
Fixed composition
Cannot be separated into simpler substances by physical methods (physical changes)
Can only be changed in identity and properties by chemical methods
Properties
do not vary & are unique
Pure substanceSlide13
Elements
Compounds
substancesSlide14
Compounds
CAN be broken down by chemical means
always in a definite
ratio
It’s own unique properties
Ex: water - H
2
O,
iron(II) sulfate- FeSO
4
Elements
CANNOT be broken down
On periodic table!Ex: hydrogen, oxygenCompounds
vs elementsSlide15
Mixture
substancesSlide16
MIXTURES
M
ixtures
Mixtures are two or more substances that are NOT chemically combined.Slide17
Homogeneous
Heterogeneous
substancesSlide18
Homogeneous
looks the same throughout but can be separated by physical means (like filtering)
No visible parts
Also called solutions
Ex: milk, yogurt, Gatorade
Heterogeneous
composed
of visible parts that are easily separated by physical means.
Ex: fruit salad, vegetable soup, sand etc.
Homo
vs
heteroSlide19
PRACTICE
(CH 1 # 72)Slide20
#72) Chemical or physical change? Mixture (homo or hetero) or pure substance (compound or element)
?
An
orange liquid is distilled, resulting in the collection of a yellow liquid and a red
solution
A
colorless, crystalline solid is decomposed,
yielding
a pale yellow-green gas and a soft, shiny
metal
A cup of tea becomes sweeter as sugar is addedPure Substance
PracticeSlide21
Filtration
Chromatography
Distillation
Pure Substance
S
eparation
DEMO!Slide22
HW
(CH 1 # 67, 70, 71)Slide23
BIG GOAL