Transcript DO NOW! - Hall High School

DO NOW!
• What do you know about mass and weight?
• Complete the chart on the top of the front page
of your notes packet.
The International
System of Units
(The Metric System)
Review
• Metric system is based on powers of 10
• Standard units in the metric system are meter,
liter, gram
Prefixes
kilo
hecto
deca
meter
liter
gram
deci
centi
milli
• The two methods of converting between units
within the metric system include the ladder
method (moving decimal place), and using
conversion factors.
Ladder Method
1
2
KILO
1000
Units
HECTO
100
Units
3
DEKA
10
Units
Standard
DECI
0.1
Unit
Meters
Liters
Grams
How do you use the “ladder” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of
jumps in the same direction.
CENTI
0.01
Unit
MILLI
0.001
Unit
4 km = _________ m
Starting Point
Ending Point
How many jumps does it take?
4. __. __. __. = 4000 m
1
2
3
The Conversion Factor Method
The following are common metric system
equations that can be used as conversion factors
to cancel out units.
1 m = 100 cm
1000 mL = 1 L
1 kg = 1000 g
1 g = 1000 mg
Example:
Using Conversion Factors
How many milliliters are in 15.67 L of water?
Given: 15.67 L of water
Needed: mL of water
𝟏𝟓. 𝟔𝟕 𝐋
∙
𝟏
1000 𝐦𝐋
1 𝐋
= 15,670 mL