metric system slideshow - · pdf filemass refers to the amount of matter in an object the base...
TRANSCRIPT
Why Metric?The metric system is a system of measurement that is used by scientists all over the world
It is simpler and easier to use and understand
Most countries only use the metric system
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Metric UnitsThere are different metric units depending on what we want to measure
LENGTH: meter (m)
VOLUME: liter (l)
MASS: gram (g)
TEMPERATURE: celsius (c)
Base
Uni
ts
Prefixes are ImportantWhen you add a prefix to a base unit you change it’s value.
kilo: 1000
hecta: 100
deca: 10
deci: 0.1 (1/10)
centi: 0.01 (1/100)
milli: 0.001 (1/1000)
Length/DistanceThe basic unit of length in the metric system is the meter and is represented by a lowercase m
To measure length we use a ruler
The standard for length is determined by how far light travels in an absolute vacuum in 1/2,999,792,458 of a second
Which is larger?
1 meter or 105 centimeters
4 kilometers or 4400 meters
12 centimeters or 102 millimeters
1200 millimeters or 1 meter
Metric Units:
1 kilometer (km) = 1000 meters
1 meter = 100 centimeters (cm)
1 meter = 1000 millimeters (mm)
MassMass refers to the amount of matter in an object
the base unit of mass in the metric system is the kilogram and is represented by kg
Mass is measured using a scale
The standard for mass is equal to the mass of a platinum-iridium cylinder kept in Sevres, France.
English vs. MetricWhich is larger…?
1 pound or 1 kilogram
1 pound or 100 grams
1 ounce or 1 milligrams
Which is larger?
1 kilogram or 1500 grams
1200 milligrams or 1 gram
12 milligrams or 12 kilograms
4 kilograms or 4500 grams
Metric Units:
1 kilogram (kg) = 1000 grams
1 gram = 1000 milligrams (mg)
VolumeVolume is the amount of space an object takes up.
The base unit of volume in the metric system is the liter and is represented by a L or l
The standard is equal to one cubic decimeter
Measuring VolumeVolume is measured using a graduated cylinder
To properly measure volume you must read the number at the bottom of the curve or meniscus
You must also be at eye level