Measurement. SI Units Scientists use the same international system for measurement called SI units ...
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Transcript of Measurement. SI Units Scientists use the same international system for measurement called SI units ...
Measurement
SI Units
Scientists use the same international system for measurement called SI units Short for Systeme Internationale d’Unites
(French) Helps scientists compare research from around
the world Built on 7 metric base units
SI Units
The Big 5
Measurement Unit
Length Meters (m)
Mass Kilograms (kg)
Time Seconds (s)
Amount Moles (mol)
Temperature Kelvin (K)
Metric Prefixes Metric prefixes are made to make base units larger or smaller
REMEMBER:
King Henry Died By Drinking Chocolate Milk
Prefix Unit Abbreviation
Meaning (__ plug in a base unit of g, L, or m)
Kilo k 1000 __ = 1 k__ (i.e. 1000 m = 1 km)
hecto h 100 __ = 1 h__
deca da 10 ___ = 1 da___
base (No Prefix) g or L or m Base unit
deci d 1 ___ = 10 d ___
centi c 1 ___ = 100 c ___
milli m 1 ___ = 1000 m ___
Temperature Conversions Temperature Scales
Fahrenheit (°F) Daily temp… not scientific
Celsius (°C) Freezing point of water = 0°C Boiling point of water = 100°C
Kelvin (K) SI unit of Temperature
Absolute Zero 0 K When all motion stops We have gotten to a millionth of a degree but never 0 K
Temperature Conversions
1 °C = 1 K
Changing FROM °C K
°C + 273 = K
Changing FROM Kelvin °C
K-273 = °C
Convert the Following…
25 ° C = ______ K
123 ° C = _______ K
853 K = _______ ° C
87.89 K = _______ °C
0 °C = _____ K
0 K = ______ °C
298
396
580
-185.11
273
-273
Density
Density – ratio of mass of an object to its volume
Density = MassVolume
The density of water = 1.0 g/mL If density is > 1, object will sink If density is < 1, object will float
Mass
VolumeDensity
Common Units:
Mass: g, kg, lbs
Volume: L, mL, gal., qt., cm3
Density: g/mL; lbs/gal; g/cm3
Density Column