Exploring the metric system for 7th grade (2).notebook
September 14, 2015
Metric System
The metric system is used world­wide and in all science laboratories
It is a measurement based on the number 10 or base 10.
example
10 = 1 x 10
100 = 1 x 10
1,000 = 1 x 10
10,000 = 1 x 10
100,000 = 1 x 10
1,000,000 = 1 x 10
0.1 = 1 x 10
0.01 = 1 x 10
0.001 = 1 x 10
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Exploring the metric system for 7th grade (2).notebook
September 14, 2015
Metric System
SI = International Systems of Units
Basic unit of length is the meter (m)
Basic unit of mass is the Kgram (g)
Basic unit of volume is the liter (L)
Prefixes that are used:
Kilo (K) means 1,000 times the unit.
Deci (d) means 1/10 or 0.1 unit
Centi (c) means 1/100 or 0.01 unit
Milli (m) means 1/000 or 0.001 unit
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Exploring the metric system for 7th grade (2).notebook
September 14, 2015
SI or the System International d'Unites
SI is the standard system of measurement that allows scientists to compare date and communicate with each other about their results.
Length ­­ is the distance between two objects. It is measured in meters
Mass ­­ is a measure of the amount of matter an object contains. It is measured in grams. We use a triple­beam balance by comparing the mass of the object you are measuring to a known mass.
Weight ­­ is the measure of gravitational force acting on the object. We use sa spring scale. It is measured in Newtons.
Volume ­­ is the amount of space an object takes up. It is also known as the shape of an object. It is measured in liters.
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Exploring the metric system for 7th grade (2).notebook
September 14, 2015
Common Conversions you should know
1 Km = 1,000 m
1 m = 100 cm
1 m = 1,000 mm
1 cm = 10 mm
1 L = 1,000 mL
1 Kg = 1,000 g
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Exploring the metric system for 7th grade (2).notebook
September 14, 2015
Converting metric units
Kilo
Hecto
Deka
1000
100
10 units
units
units
Basic
Unit
Deci
Centi
Milli
0.1
0.01
0.001
unit
unit
unit
To convert to a larger unit, move the decimal point to the left or divide.
1000 mg = ______________g
250 m = _____________ Km
109 g = _____________ Kg
To convert to a smaller unit, move the decimal point to the right or multiply.
1 L = ________________ mL
160 cm = ____________ mm
14 Km = _____________ m
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Exploring the metric system for 7th grade (2).notebook
September 14, 2015
Using the metric ruler
Uses centimeters and millimeters
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Exploring the metric system for 7th grade (2).notebook
September 14, 2015
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