bell ringer
DESCRIPTION
Bell Ringer. Round 37050 kg to 3 sig figs. What is the rule for addition and subtraction? What is the rule for multiplication and division?. (12 x 3.5 + 0.451) ( 3.24 x 5.123). Elements Quiz. Elements Quiz. You need a pen or pencil - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/1.jpg)
Bell Ringer1. Round 37050 kg to 3 sig figs.2. What is the rule for addition and
subtraction?3. What is the rule for multiplication and
division?4.
(12 x 3.5 + 0.451)
(3.24 x 5.123)
![Page 2: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/2.jpg)
Elements Quiz
Period
9/9 Tuesday
2nd 55
3rd 66
4th 63
5th 56
6th 51
![Page 3: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/3.jpg)
Elements Quiz You need a pen or pencil
Once done with your quiz, please take out your sig figs calculations hw
![Page 4: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/4.jpg)
MeasurementsMeasurements
Metric (SI) unitsMetric (SI) units PrefixesPrefixes UncertaintyUncertainty
Significant figures
Significant figures
Conversionfactors
ConversionfactorsLengthLength
DensityDensity
MassMass VolumeVolume
Problem solving withconversion factors
Problem solving withconversion factors
![Page 5: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/5.jpg)
SI Base UnitsBase Quantity Name
SymbolLength meter mMass kilogram kgVolume Liter LTime second stemperature Kelvin Kamount of substance mole molelectric current ampere Aluminous intensity candela cd
![Page 6: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/6.jpg)
MeasurementsMeasurements
Metric (SI) unitsMetric (SI) units PrefixesPrefixes UncertaintyUncertainty
Significant figures
Significant figures
Conversionfactors
ConversionfactorsLengthLength
DensityDensity
MassMass VolumeVolume
Problem solving withconversion factors
Problem solving withconversion factors
![Page 7: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/7.jpg)
Exact Numbers Considered to have an infinite number
of significant figures Ex. “There are 4 quarts in a gallon”, the
number 4 would be exact Ex. “A is two times as large as B”, the
number 2 would be exact Usually involve counted values,
conversion factors, or definitions
![Page 8: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/8.jpg)
MeasurementsMeasurements
Metric (SI) unitsMetric (SI) units PrefixesPrefixes UncertaintyUncertainty
Significant figures
Significant figures
Conversionfactors
ConversionfactorsLengthLength
DensityDensity
MassMass VolumeVolume
Problem solving withconversion factors
Problem solving withconversion factors
![Page 9: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/9.jpg)
PrefixesYou must know: kilo = 1000 centi = 1/100 milli = 1/1000
Useful in future: Mega = 106
nano = 10-9
pico = 10-12
![Page 10: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/10.jpg)
Fill in the missing numbers 1 kg = ____ g 1g = ____ cg 1g = ____ mg
1 km = ____ m 1 m = ____ cm 1 m = ____ mm 1 cm = ____ mm
1L = ____ mL 1mL = ____ cm3
![Page 11: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/11.jpg)
MeasurementsMeasurements
Metric (SI) unitsMetric (SI) units PrefixesPrefixes UncertaintyUncertainty
Significant figures
Significant figures
Conversionfactors
ConversionfactorsLengthLength
DensityDensity
MassMass VolumeVolume
Problem solving withconversion factors
Problem solving withconversion factors
![Page 12: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/12.jpg)
Dimensional Analysis (aka conversions) Def: method of calculation utilizing a
knowledge of units where conversion factors are used to manipulate units
The conversion factors are simple ratios
Ex: 1 hr = 60 min, 1 mol = 6.022 x 1023 atoms
![Page 13: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/13.jpg)
Steps to Dimensional Analysis What data are we given? What quantity do we need (our unknown)? What conversion factors are available to
take us from what we are given to what we need?
[perform calculation] Does our answer make sense?
![Page 14: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/14.jpg)
Factor Label Method(used in all chemistry and physics classes. Save yourself lots of grief and learn it now!) Remember these two ideas:
1. Any number can be multiplied by 1 without changing its value.
2. Multiplying by a conversion factor is like multiplying by 1 because the numerator and the denominator are equal.
Ex.
![Page 15: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/15.jpg)
Let’s do some together!1. Ms. B’s college ring weighs ______ g. How
many kg is this?
2. Convert 2 L of Monster to mL.
3. Convert 2.5 kg to mg.
![Page 16: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/16.jpg)
Crash Course Chemistry https://
www.youtube.com/watch?v=hQpQ0hxVNTg
3:07-5:18
![Page 17: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/17.jpg)
Whiteboard Race How many L is 36.2 mL?
![Page 18: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/18.jpg)
Whiteboard Race How many teaspoons are in a liter bottle
of Sprite? 1tsp = 4.93mL
![Page 19: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/19.jpg)
Whiteboard Race Wes speeds down the hallway at a
whopping 4 miles per hour. How many km/s is he travelling?
![Page 20: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/20.jpg)
Whiteboard Race You scrounge up the money to by a
Jaguar (the car, not the animal…). You’re going down the highway with your speedometer reading 47 km/hr. Are you speeding if the speed limit is 60 miles/hr?
![Page 21: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/21.jpg)
Whiteboard Race In a primitive barter society, the
following rates of exchange exist:1 fot = 5 vum 2 sop = 3 tuz4 bef = 3 tuz 9 fot = 2 bef
A woman has 4 sop and wants to convert all her possessions into vum. How many vum can she trade for?
![Page 22: Bell Ringer](https://reader035.vdocument.in/reader035/viewer/2022062723/56813b4a550346895da43764/html5/thumbnails/22.jpg)
Exit Ticket (turn in on the way out) Convert 8.4x10-2cm to mm.
Convert 5 ft to cm. (1 in = 2.54 cm)