1. Measurements

2. Metric measurement is the tool used in science
Metric measurement is the tool used in science. Because of its ability to measure very small, microscopic samples, the metric units afford the scientist very accurate numbers.
There are three metric units – liter, gram, meter.
Each measures a specific property of matter.
The metric system is based on powers of ten, so it is very easy to use. Just remember to multiply or divide by ten or a power of ten.

3. Kilo: of any unit
unit gram, liter, meter
Deci: of any unit It will take 10 decis
to make up 1 unit
Centi: of any unit
Milli: of any unit
Micro:
Nano: of any unit

4. So: if we want to move from one value in the metric scale to another value, we
multiply or divide by powers of 10.
What does this mean, Well…..
Let’s say we know that we have 100 cm of string and we want to know how
many meters that is.
First decide in which direction is our conversion-are we going from a larger unit
to a smaller unit or from a smaller unit to a larger unit. Since cm are smaller
than meters, we are moving from smaller to larger and therefore we divide.
Now what do we divide by??? Go back to what you know. How many centis fit
in a unit? 100 cm = 1 m. This conversion stays constant - it will never change.
Ok now we know that we have to divide by 100.
100cm/100cm = 1

5. Easy right. Okay let’s try something more difficult.
What if we have 17.5 cm of string. How many meters is that going to be?
Remember in what direction are we going-smaller to bigger or bigger to smaller?
Like before we are going from smaller to bigger so we will divide. The conversion stays the same: 100 cm= 1m
To convert 17.5 cm into meters we will divide by 100:
17.5/100 = m

6. We have converted values from smaller to bigger. Let’s go the other way.
How many mm are there in 3 m? Remember, in which direction are we going-
smaller to bigger or bigger to smaller?
There are 1000 mm in 1 m so the meter is bigger than the mm. We will be
converting from bigger to smaller.
We will multiply. But by what?
Remember the conversion: mm = 1m We need to multiply by So:
3m x = mm.

7. How many cm are there in 24.2 m?
Remember, step 1: in which direction are you going?
Step 2: what is the conversion factor for converting 1 m into cm?
Step 3: multiply or divide using the conversion factor.

8. Some examples:
35 kg = dg
.3 dl = ml
16.2 cm = mm
.08 g = cg

9. Answer sheet
350,000
300
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