1. Why do you think scientists use the metric system?

2. The Metric System
An internationally agreed upon system, based on the number 10
Officially called the SI system, built on a foundation of 7 "base units".
What it is

3. The Metric System What it is The 4 base units we’ll use
An internationally agreed upon system, based on the number 10
Officially called the SI system, built on a foundation of 7 "base units".
Mass - gram (g)

4. The Metric System What it is The 4 base units we’ll use
An internationally agreed upon system, based on the number 10
Officially called the SI system, built on a foundation of 7 "base units".
Mass - gram (g)
Volume - Liter (L)

5. The Metric System What it is The 4 base units we’ll use
An internationally agreed upon system, based on the number 10
Officially called the SI system, built on a foundation of 7 "base units".
Mass - gram (g)
Volume - Liter (L)
Distance - meter (m)

6. The Metric System What it is The 4 base units we’ll use
An internationally agreed upon system, based on the number 10
Officially called the SI system, built on a foundation of 7 "base units".
Mass - gram (g)
Volume - Liter (L)
Distance - meter (m)
Time - second (s)

7. The Metric System prefixes
We attach prefixes – a group of letters – in front of each metric unit to tell us how much bigger or smaller we want it.
prefix letter size
mega M 1,000,000
kilo K ,000
hecto H
deka dk
“unit”
deci d
centi c
milli m
micro μ

8. K H D u d c m

9. Metric Conversion practice
1.  1000 cl = _______ L   120 mm = _______ cm 3.  1200 cl = _______ L
4.  2 cm = _______ mm   11000 L = _______ kl 6.  10 cl = _______ml
7.  12000 m = _______ km   8 g = _______ cg 9.  80 ml = _______ cl
10.  3 L = _______ cl   2000 L = _______ kl 12.  5 cm = ______ mm
13.  900 cm = _______ m   11 cg = _______ μg 15.  900 m = ____ km
16.  7000 ml = _______ L   5 kg = _______ g 18.  60 mm = _____ cm
19.  1 kg = _______ g   4000 ml = _______ L 21.  1 cl = _______ ml
22.  1100 L = _______h L    g = _____ Mg 24.  20000 μl = _____ L
25.  7000 L = _______ kl   70 ml = _______ cl 27.  5 g = _______ cg
28.  9 cl = _______ ml   1 g = _______ cg 30.  8 kg = _______ g