Scientific Method, Units of Measurement, Scientific Notation
Scientific Measurement
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Transcript of Scientific Measurement
CHAPTER 1
Scientific Measurement
International System of Units (S.I.)
Universally used by scientists Advantage of S.I.
Le Systeme International d’Unites Everything is in multiples of 10
Length / Distance
Length = measured in meters (m) 100 cm = 1 m : 3.3 ft = 1 m
Volume
Volume is the amount of space something occupies
Volume = measured in liters (L)To calculate the volume of a:
Rectangle – length x width x height Liquid – graduated cylinder Irregular object – water displacement
How to read a graduated cylinder
Place the graduated cylinder on a FLAT surface.
Move down to eye level Read the meniscus (level at the bottom of the
curve in the liquid)
Mass
Mass is the amount of matter in an objectMass = measured in grams (g) To calculate mass:
Use a balance scale – balance with an object of known mass
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**Mass is different from weight – weight is a measure of the pull of gravity Weight changes in different gravities, mass doesn’t change
Unlike mass, weight can be zero. An example of this is an astronaut floating in space - there's no gravity acting on his body and, therefore, he has no weight.
Weight is commonly measured in Newtons.
Temperature
Celsius is the most commonly used to express temperature. Celsius Fahrenheit
T(f) = 1.8C + 32 C = T(f) – 32 / 1.8
“King Henry Died By Drinking Chocolate Milk”
Metric Units
Kilo Hecta Deka Base Deci Centi Milli
x1,000 x100 x10 x1 1/10 1/100 1/1,000
meters (m) liters (L) grams (g)