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Metric Mania

Learning to Make Conversions: Middle School Science
by

Lauren Maguire

on 19 August 2015

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Transcript of Metric Mania

Units and Prefixes
Volume
Mass
Length
Conversions (ladder or jumping method)
These two zeros are not significant
Metric Conversions
To convert a metric unit, you move the decimal point over however many places the new unit is. If you are going from a small unit to a larger unit you move the decimal to the
left
. If you are going from a large unit to a smaller unit, you move the decimal to the
right
.
For example, you need to convert 18 cm to Dm. Find the decimal point. It is after the eight in eighteen, "18.", and move the decimal over 3 places to the left to reach dekameters like the picture shows. 18 cm = 0.018 dam
Next, add zeros in the empty spaces of where the decimal has been moved. ALWAYS ADD A "COURTESY" ZERO IN FRONT OF THE DECIMAL POINT. This helps the decimal stand out.Your final number should be 0.018 dekameters (Dm).
Tools Used in the Lab
Graduated Cylinder- Used to measure the volume of a liquid using small or large metric measurements. They are used for more accurate, precise numbers.
Beaker- Used to measure the volume of a liquid using larger metric measurements.
They are generally not used to get a precise measurement.
Triple Beam Balance and Electronic Balance- used to measure the mass of an object. Used for precise measurements.
More Tools Used in the Lab
Metric Ruler- Used to measure the
length
of an object no longer than 30.5 cm long. Includes inches, centimeters and millimeters. Also used to measure
volume
of regular shaped objects.
Meter Stick- Used to measure the length of an object no longer than 100 cm long. Includes inches, centimeters, and millimeters.
Pipette- Used to suck up a liquid and then distribute it into another container in very small amounts. Pipettes are not used for measuring.
Topics
8 basic prefixes - mnemonic device
K
ind
H
enry
D
ied
b
y
d
rinking
c
hocolate
m
ilk

King (K)-

kilo- 1000x
Henry (H)-
hecto- 100x
Died (D)-
deca- 10x
by (B)-
base unit
stands for
gram, liter, meter
.
drinking (d)-
deci (0.10)
chocolate (c)-
centi (0.01)
milk (m)-
milli (0.001)
What are the Basic Metric Units and Prefixes of the Metric System?
Volume
Length
Density
Mass
Mass is the amount of matter in an object. Mass is measured in
grams
. There is no formula for mass. You would use a triple beam balance or an electronic balance to find mass.
Mass is constant.
Weight is not the same as mass. If an object has a mass of 100 kg on Earth.....it will also have a mass of 100 kg on the moon. However, that same object would weigh 220 pounds on Earth, but on the moon its weight would be 36.5 pounds.
Mass
is a
comparative
measure (like two things on a see saw) where as
weight
is the measure of the
force of gravity
. Gravity changes depending on where you are. Two things on a see saw will balance anywhere.
Volume is how much space something takes up. Volume is measured in liters or
cubic centimeters.
The formula for volume of a solid is LxWxH. To find volume of a liquid or an irregular shaped object, use a graduated cylinder. To find the volume of a regular shaped object, use a ruler.
Length is how long, high, or wide an object is. To find length, you would use a metric ruler or a meter stick. The
meter
is the unit for length.
The Metric System
Important : There is
ALWAYS
a
DECIMAL
in every single digit. We often do not "see" it ( when we write whole numbers like 20 or 564) but it is always, always, always there.
The decimal is found for all eternity between the ones and tenths place.
Once again........
What are the
abbreviations
of the prefixes
used in the metric
system?
volume
You need to memorize the indicated abbreviations
Let's Sing
An
Erlenmeyer flask
is a cone-shaped container with neck, so you can hold the flask or attach a clamp or use a stopper.
Chorus
Meters, liters, and grams, now you donʼt have to cram
For your exam on the metric system. Repeat


Let me start with ways you can measure a distance, length, or height,
Mad tall or super small, one of these will do you right.
If you try walkinʼ a meter, itʼs easy to complete
Because a meterʼs just a little bit more than 3 feet.
But if youʼre walkinʼ a kilometer itʼs gonna take a while,
Itʼs 1000 meters, thatʼs over half a mile!
A centimeterʼs dinky, the width of your pinky,
100 of them go into a meter, you still with me?
Thereʼs another kind of meter smaller than that,
Itʼs not very fat, itʼs called a millimeter in fact, and itʼs
Tiny. 1000 of them in a meter fit,
Thatʼs 10 in a centimeter, and thatʼs it!
Chorus
Meters, liters, and grams, now you donʼt have to cram
For your exam on the metric system.

Verse II
Now weʼre movinʼ on to the liters, measuring liquids in containers,
Weʼve only got 2, it wonʼt take long to explain this:
A liter, itʼs half a big bottle of soda pop,
And a milliliter, itʼs just about 20 drops.
Thereʼs 1000 milliliters in a liter you know,
So if you got both of those youʼre good to go.
So now we can move on to the grams, measuring mass,
Kilograms, milligrams, yeah weʼre going to pass
Itʼs pretty simple. A paper clip weighs about a gram.
A big textbook is a kilogram, man, but a
Milligram, thatʼs a little harder to slice
Because 10 milligrams is about a grain of rice.
1000 milligrams, is a gram.
1000 grams in a kilogram.
Now we got grams and we also got liters,
Put them all together with the meters.
Chorus
Meters, liters, and grams, now you donʼt have to cram
For your exam on the metric system. Repeat


Let me start with ways you can measure a distance, length, or height,
Mad tall or super small, one of these will do you right.
If you try walkinʼ a meter, itʼs easy to complete
Because a meterʼs just a little bit more than 3 feet.
But if youʼre walkinʼ a kilometer itʼs gonna take a while,
Itʼs 1000 meters, thatʼs over half a mile!
A centimeterʼs dinky, the width of your pinky,
100 of them go into a meter, you still with me?
Thereʼs another kind of meter smaller than that,
Itʼs not very fat, itʼs called a millimeter in fact, and itʼs
Tiny. 1000 of them in a meter fit,
Thatʼs 10 in a centimeter, and thatʼs it!
Chorus
Meters, liters, and grams, now you donʼt have to cram
For your exam on the metric system.
Verse II
Now weʼre movinʼ on to the liters, measuring liquids in containers,
Weʼve only got 2, it wonʼt take long to explain this:
A liter, itʼs half a big bottle of soda pop,
And a milliliter, itʼs just about 20 drops.
Thereʼs 1000 milliliters in a liter you know,
So if you got both of those youʼre good to go.
So now we can move on to the grams, measuring mass,
Kilograms, milligrams, yeah weʼre going to pass
Itʼs pretty simple. A paper clip mass is about a gram.
A big textbook is a kilogram, man, but a
Milligram, thatʼs a little harder to slice
Because 10 milligrams is about a grain of rice.
1000 milligrams, is a gram.
1000 grams in a kilogram.
Now we got grams and we also got liters,
Put them all together with the meters.

SI Units
mass - gram (g)
volume - liter (L)
length - meter (m)
temp - Celsius
Full transcript