1. Wednesday August 31st, 2016 Daily Science Question:
Why do they use the International System of units (e.g, meters, kilograms) during the Olympic games.

2. Likewise the International System of Units
Because it allows people from all over the world to communicate the results of the different sporting events.
Likewise the International System of Units
allows scientists to compare data and communicate the results of scientific investigations.

3. Red = countries that don’t use S.I. system
Why Use S.I.?
Red = countries that don’t use S.I. system

4. Which conversion could you do faster?
Why Use S.I.?
1 ft = 12 in
How many inches are in 25 ft?
1 cm = 10 mm
How many millimeters are in 25 cm?
Which conversion could you do faster?

5. Why Use S.I.?
Based on powers of 10… easy to use
Most of the world uses it… easier to communicate

6. Lesson Objective
I can select and use appropriate tools and metric system units to make observations.

7. Base S.I. Units
MASS: gram (g)
LENGTH: meter (m)
LIQUID VOLUME: Liter (L)
SOLID VOLUME: cubic meters (m3)

8. S.I. Prefixes Added to beginning of base units
Kilo (k) means x1,000  BIG measurements
Centi (c) means ÷100  SMALL measurements
Milli (m) means ÷1,000  TINY measurements

9. Length Distance between 2 points
Tools: ruler, meter stick, tape measure
Common units: m, cm, mm, km

10. Measuring Length (pick up your metric ruler)
1 centimeter = 10 millimeters
How many millimeters are in 1 centimeter?
What is the length of the line in centimeters? _______cm
What is the length of the line in millimeters? _______mm
What is the length of the line to the nearest centimeter? ________cm
HINT: Round to the nearest centimeter – no decimals.
Ruler:

11. Metric Units km m cm mm
The basic unit of length in the metric system in the meter and is represented by a lowercase m.
Metric Units
1 Kilometer (km) = 1000 meters
1 Meter = 100 Centimeters (cm)
1 Meter = 1000 Millimeters (mm)
1 centimeter = 10 millimeters
Which is larger?
A. 1 meter or 105 centimeters
B. 4 kilometers or 4400 meters
C. 12 centimeters or 102 millimeters
D millimeters or 1 meter

12. What unit would you use to measure….
1.The distance from Covington to New Orleans? Km 2. The size of your book? cm 3. The size of a small insect? (eg. Red ant) mm

13. Can you measure up? (7min)
Use the appropriate tools to measure the following; remember to include the units:
the length of a straw (cm)
The width of the class (windows to door) m
The length of the string (mm and cm)
WRITE CLEARLY AND SAVE THESE MEASUREMENTS AS YOU WILL TURN THEM IN!

14. Conversions 100 cm = 1 m 1000 mm = 1m 1000 mm = 100 cm 10 mm = 1 cm
So, there are ten times more mm than cm
153 cm = ? mm

15. Conversions 100 cm = 1 m 1000 mm = 1m 1000 mm = 100 cm 10 mm = 1 cm
So, there are ten times more mm than cm
153 cm = 153(10) mm

16. Conversions 100 cm = 1 m 1000 mm = 1m 1000 mm = 100 cm 10 mm = 1 cm
So, there are ten times more mm than cm
153 cm = 1530 mm
General rule:
When you go from larger units to smaller units you multiply
When you go from smaller units to larger units you divide

17. Convert the Following
10 cm into mm
1.8 cm into m
47.9 mm into cm
329.8 cm into mm

18. Convert the Following
10 cm into mm = 100 mm
1.8 cm into m = .018 m
47.9 mm into cm = 4.79 cm
329.8 cm into mm = 3298 mm