Warm up
1. What is the basic unit for length in the metric
system?
2. What is the basic unit for volume in the
metric system?
3. What is the basic unit for mass in the metric
system?
Lessons 1 & 2
Metric Conversions
and Length
T. Trimpe 2008 http://sciencespot.net/
I. Background
A. The Metric System is a system of units for
measurement
B. Used by scientists around the world
C. Easy to use because it is based on units of
ten (10)
Burma, Liberia, United States
II. How it works…
A. The basic units:
1. Length=meter
2. Volume=liter
3. Mass=gram
B. Add prefixes for larger or smaller divisions
1. King Hector Doesn’t [usually]
Milk!
Drink Chocolate
III. Ladder Method
KILO
1000
Units
HECTO
100
Units
DEKA
10
Units
DECI
0.1
Unit
Meters
Liters
Grams
CENTI
0.01
Unit
MILLI
0.001
Unit
A little trick…
King
Hector
Doesn’t
(usually)
Drink
Meters
Liters
Grams
Chocolat
e
Milk
1
2
KILO
1000
Units
3
HECTO
100
Units
DEKA
10
Units
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
Warm up
1. Read and complete the “Analyzing Elements
of the Scientific Method” handout.
2. For the 6 questions at the bottom, underline,
circle, or highlight the 1 word in each
question that describes a step in the
scientific method.
Conversion Practice
Try these conversions using the ladder method.
1000 mg = _______ g
1 L = _______ mL
160 cm = _______ mm
14 km = _______ m
109 g = _______ kg
250 m = _______ km
Compare using <, >, or =.
56 cm
6m
7g
698 mg
Metric Abbreviations
Write the correct abbreviation for each metric unit.
1) Kilogram ____
4) Milliliter ____
7) Kilometer ____
2) Meter _____
5) Millimeter _____
8) Centimeter ___
3) Gram _____
6) Liter _____
9) Milligram ____
Conversion Practice
1000 mg = _______ g
1 L = _______ mL
160 cm = _______ mm
14 km = _______ m
109 g = _______ kg
250 m = ______ km
Conversion Practice
Compare using <, >, or =.
56 cm
6m
7g
698 mg
Metric Conversion Challenge
Try these conversions, using the ladder method.
10) 2000 mg = _______ g
15) 5 L = _______ mL
20) 16 cm = _______ mm
11) 104 km = _______ m
16) 198 g = _______ kg
21) 2500 m = _______ km
12) 480 cm = _____ m
17) 75 mL = _____ L
22) 65 g = _____ mg
13) 5.6 kg = _____ g
18) 50 cm = _____ m
23) 6.3 cm = _____ mm
14) 8 mm = _____ cm
19) 5.6 m = _____ cm
24) 120 mg = _____ g
Warm up…
1.Convert 5,720
km to cm.
2.Convert 23 mg to
dag.
Scientific Method
1. Find the “Analyzing Elements of the
Scientific Method” handout.
2. Look at the 6 words you circled, underlined
or highlighted yesterday.
3. List those words in the boxes on the back of
the sheet and DRAW A PICTURE to
represent at least 3 of those steps in the
scientific method.
More conversions
1. Complete as many of the 25 practice
problems as you can until Mrs. Lock stops
the class.
2. Check your answers. Mark any that are
incorrect with a colored pencil.
3. Turn in your sheet.
4. You may get an EXTRA COPY of the sheet
if you want to practice at home.
Warm up…
1.Convert 5,720
cm to hm.
2.Convert 23 kg to
dag.
Measuring Length in Metric Units
Largest lines
are centimeters
1
Smallest
lines are
millimeters
2
3
4
5
Measuring Length in Metric Units
1
2
3
4
How big
is the
oval?
5
How many mm are found in 1 cm?
How long is the line segment in mm?
How long is the line segment in cm?
How long is the line segment in mm?
How long is the line segment in cm?
How long is the line segment in mm?
How long is the line segment in cm?
Practice
Answer
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
0.05
0.02
3000
2.5
0.55
0.67
324
0.61
15
420
20
0.55
Now…
Check
your
answers
again.
Which
ones do
you want
to see me
do on the
board?
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
3
1.6
0.08
0.85
2000
10,000
0.00075
0.0001
0.075
0.01
10
2500
650