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Main purpose is to give numbers meaning!

If I tell you, “I’ll be back in 5…”





Seconds
Hours
Minutes
Years……
You never know when I’m coming back.
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They let you know what
you are dealing with.
Help you keep track of
the correct answer.
You can use them to
check if your equations
are bogus.
Old English System Metric System
Distance  In, ft, yards, miles  Meter
 cups, quarts,
 Liter
Volume
gallons
Temperature  Farenheight
 Celsius
 seconds, minutes,  seconds, minutes,
Time
hours
hours
 Slugs
Mass
 Grams
 Pounds
Force
 Newtons

NASA lost a 125 million
Mars orbiter because
one engineering team
used metric units while
another used English
units for a key
spacecraft operation,
according to a review
finding released
Thursday.--CNN
Convert the following:
1) How many meters are in 24 kilometers?
24,000 meters
2)
How many grams are there in 36 miligrams?
0.036 grams
3)
How many miliseconds are there in 3 hectoseconds?
300,000 miliseconds
4)
How many miligrams are there in 8 decimeters?
?????????
Can you add
12ft + 3yrd + 24in =
 39 ftyrdin ??????
You must convert the units!
Pick something that everything
can easily convert into and
 This type of logic can
then add
only result in…
3yrd = 9 ft
24in = 2ft
12ft + 9ft + 2ft =
23 ft 
Lets say we need to turn 13.1 miles into inches.
How would we do it?
1. Always start with what you’ve been given
2. Then map your way to the unit you want
13.1 mi 5280 ft
12 in
1 mi
1 ft
830,016 in

How tall are you in meters?

How tall are you in ears?
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How many hours old are you?
The new field is 1.6 miles long. What would that be
in kilometers?
1.6 mi
ft
in
mi
ft
cm
in
2.57 km
m
cm
km
m
What do we do if we have a mixed unit?
Speed limit is 15 m/s and I need to know what it is in
mi/hr…..
Convert the top unit first and then the bottom unit
15 m
3.28 ft
s
1 m
1 mi
5280 ft
33.5 mi/hr
60 s
1 min
60 min
1 hr
If my hose sprays out 10 gallons per minute, How
many liters per second would that be?
0.63 liters/second

Station 1: Length of a pencil
Find the length of the pencil in miles. There are 1.6 kilometers in a mile.

Station 2: Mass of a paper clip
Find the mass of the paper clip in tons. There are 2.2 pounds in a kilogram
and 2000 pounds in a ton.
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Station 3: Volume of a very small beaker
Find the volume of the beaker in gallons. There are 0.26 gallons in a liter.
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Station 4: Temperature of your armpit
Find the temperature of your armpit in Kelvin. The temperature of a
substance in Kelvin is equal to its temperature in Celsius plus 273.
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Station 5: Length of time you can hold your breath
Find the maximum length of time you can hold your breath, in years.
There are 365.25 days in one year.
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Station 6: Area of a paper towel
Find the area of a paper towel in square meters. (convert the side lengths
to meters before you multiply)