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Metric System 7th/8th Grade

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by

Josh Kelly

on 9 August 2013

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Transcript of Metric System 7th/8th Grade

Measurement
The "SI" System
(aka the metric system)
Why do scientists need an "international system"?
Length & Distance
Tools: Meter stick, metric ruler,
tape measure, trundle wheel.
Volume
Mass
base unit is the gram (g)
Metric Conversions
a repeatable observation
of an amount or quantity
that includes a number
and a unit.

Example - 7 cm, 8 cc, 12 g.
Estimate - to judge tentatively or approximately the value, worth, or significance of. Students do this A LOT!!! This is not measuring, it is guessing.

Example - About 2 cm, more than 15 minutes.
Base unit is meter (m)
Units we will use
Kilometer Km - about 10 football fields
Meter - think meter stick
Centimeter (cm) - width of little finger
Milimeter (mm) - thickness of dime
The amount of space something takes up.
Base unit is the liter (L)
What measurement would you make?
1 mL = 1 cc (cubic centimeter)

mL is used for liquid colume
cc is used for solid volume
Tools used to measure volume
Liquids - beakers, flasks, graduated cylinder
Solids - Meter stick, metric ruler
a measure of how much matter "stuff" is in an object.
measured with a balance
most common prefixes
miligram (mg)
kilogram (kg)
Density
A measure of how much matter is packed into a space.
It is a calculated measurement. It cannot be directly measurd.
Measured in g/cm3
can tell if something floats
used to identify matter
Temperature
Measure of heat in an object.
Ice melts = 0 degrees Celsius
Human Body = 32 degrees Celsius
Water boils = 100 degrees Celsius
Room temp = 22 degrees Celsius
Scientists use Celsius
America uses Fahrenheit
Conversion Practice

3

1st – Determine your starting point.

2nd – Count the “jumps” to your ending point.

3rd – Move the decimal the same number of jumps in the same direction.

Meters
Liters
Grams

MILLI
0.001
Unit

CENTI
0.01
Unit

DECI
0.1
Unit

DEKA
10
Units

HECTO
100
Units
Full transcript