1. Metric System

2. Science Daily 8/29/16 “Why Don’t Americans use the Metric System?
1. Why don’t American’s use the metric system?
2. Do you think the U.S should switch to the Metric System?
3. Why do we need to know the Metric System?
4. Name 3 things we measure.

3. Americans Discover the metric system

4. Scientists need a common system of measurement so they can communicate
• The metric system is also called the International system of units or the SI
• The metric system was invented in 1791
• The metric system is based on multiples of 10

5. King Henry Died _____ Drinking Chocolate Milk
______ ______ _______ _______ _______ _______ _______

6. What do we measure?
length-measures the distance or dimensions of an object
Mass- how much matter is in an object
Volume- how much space matter occupies

7. What tools do we use to measure objects length, mass, and volume?
Length- metric ruler
Mass- triple beam balance
Volume- graduated cylinder

8. What units do we measure length, mass, and volume?
Length-meters
Mass-grams
Volume- liters

9. Practice problems- draw on your whiteboard
1000 mg = _________g b.1 L = ________mL c. 160 cm ________mm
d. 14km_________m e. 109g=_________kg f. 250m=______km