Measurement and SI Units
Quantitative vs. Qualitative
Miss Weir
 Quantitative measurements give the result in a _________________, usually a _______________.
These measurements are __________________.
Ex:
 Qualitative measurements give results in a __________________, non-numeric form. The result is very
___________________.
Ex:
Try Some! Which of the following are quantitative measurements and which are qualitative?
◦
A flame is hot
◦
A candle weighs 92 g
◦
Wax is soft
◦
A candle’s height decreases 4.2 cm per hour
SI Units
 SI stands for système international, but it’s commonly known as the ___________________.
 The systems uses a base unit and the adds a _______________ for larger and smaller number
ie: a kilogram is 1000 grams
 When converting, remember the _______________ rule.
DOWN  move the decimal to the Right
UP  move the decimal to the Left
METRIC CONVERSIONS
To do metric conversions of linear units (distance, mass, etc.):
1. Start at the prefix you are at and count the ________________________________ to the prefix you
wish to convert to. Be sure to count a step for passing the unit without a prefix.
2. Move the ________________ the same number of places as the number of steps you counted. If you
moved up the column, move the decimal to the left. If you moved down the column, move the
decimal point to the right.
Example: 1. Convert 5.0 km to m
Try Some! Convert the following:
◦
100 m = ______________ km
◦
490 km = _____________ mm
◦
421.4 km = ____________ hm
Metric Madness Practice
Convert the following SI Units:
1) 4.6km =
__________ dm
2) 3020mm=
__________ m
3) 360 cL=
__________ daL
4) 0.05 GL=
__________ hL
5) 32 nm=
__________ mm
6) 200 mm =
__________ cm
7) 25 dg =
__________ g
8) 105 cm =
__________ mm
9) 456 000 cl =
__________ dal
10) 6 820 hg =
__________ mg
11) 1.3 Ml =
__________ kl
12) 0.000 345 dag =
__________cg
13) 0.34 m =
__________ km
2. Convert 5.0 mm to dam
14) Which of the following are quantitative measurements and which are qualitative measurements?
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
It is a light green in colour.
_______________
It tastes sour.
_______________
One leaf is 9 cm long.
_______________
It makes a loud pop sound.
_______________
The mass of the computer is 1 ½ kg. _______________
It smells sweet.
_______________
The temperature of the room increases by 8 degrees Celsius. _______________
It gets darker over a period of time. _______________
The flower clusters in 3 blooms.
_______________
Feels very rough.
_______________
The veins are 3 mm wide.
_______________
To do metric conversions of squared units (e.g. area):
For example, convert 387.5 m2 to cm2
1. Do steps 1 under conversions of linear units. (For this example, there are two steps between metres
and centimetres).
2. ______________the number of steps counted and move the decimal point that amount. (In our
example, twice the number of steps is four, so we move the decimal point four places to the right to
get the final answer of 3 875 000 cm2).
Example: 1. Convert 387.5 m2 to km2
To do metric conversions of cubed units (e.g. volume):
For example, convert 2340 cm3 to m3
1. Following steps 1 under conversion of linear units (in our example, there are 2 steps between cm and
m).
2. _____________ the number of steps counted and move the decimal point that amount (in our
example, three times two is six, so we move the decimal point six times to the left to get our final
answer of 0.00234 m3).
Example: Convert 0.3875 cm3 to mm3
Practice with Units squared and cubed:
15) 4 m2 =
__________ cm2
16) 16 m2 =
__________ mm2
17) 1 360 000 cm2 =
__________m2
18) 234 km2 =
__________m2
19) 67 m3 =
__________ cm3
20) 2345 dm3 =
__________cm3
21) 86 km3 =
__________ Mm3
22) 0.000 75 m3 =
__________ dam3
23) 9 m3 =
__________hm3
24) 0.001 km3 =
__________ hm3
25) 635 mm3 =
__________km3
__________Mm3
26) 12 pixels = ________________ mega pixels