1. Measurement Must have a standard. A standard is an exact quantity people agree to use for comparison. A standard means two people using the same object should get close to the same results.

2. Standards of the past People used to use parts of their body to determine the length of something. People used to use parts of their body to determine the length of something. The standard would be a part of the king’s anatomy. The standard would be a part of the king’s anatomy. The standard yard was the distance from the king’s nose to his outstretched arm The standard yard was the distance from the king’s nose to his outstretched arm

3. People would use their feet to measure distance This is how the term foot came about. Today the standard “foot” in the English system is 12 inches = 1 foot

4. The English system is very confusing because it has so many different values

5. America is the only country that still uses the old English system

6. Scientists give the English system the thumbs down Scientists needed an exact and uniform system of weights and measurements

7. The Mistake Two different groups of scientists were working on the calculations to send a probe to Mars. The American team did their calculations in the English standard and the other team did it in the metric system (OOPS!) MARS MARS

8. This made scientists very upset. This made scientists very upset. It cost the space program 125 million dollars It cost the space program 125 million dollars It cost the scientists their time It cost the scientists their time

9. Metric chart Kilo means thousand (1000) Kilo means thousand (1000) Hecto means hundred (100) Hecto means hundred (100) Deca means ten (10) Deca means ten (10) Deci means one-tenth (1/10) Deci means one-tenth (1/10) Centi means one-hundredth (1/100) Centi means one-hundredth (1/100) Milli means one-thousandth (1/1000) Milli means one-thousandth (1/1000)

10. Standard Units Unit for: Unit for: Length  meter Length  meter Volume  Liter Volume  Liter Mass  gram Mass  gram Time  second Time  second

11. Standard Units The Meter- Measures length Length is the distance between two points The Liter –Measures Volume Volume is how much space a liquid takes up The Gram- Measures mass Mass is how much matter is in an object

12. K H D b D C M How to use the metric chart How to use the metric chart Rewrite the problem Rewrite the problem Check for the decimal (if no decimal, put at end) Check for the decimal (if no decimal, put at end) Where do we start? Put pencil there Where do we start? Put pencil there Where do we go? Where do we go? # of hops and direction # of hops and direction Do the same with decimals Do the same with decimals

13. How the metric system works kilo hecto deca BASE deci centi milli (meter, gram or liter) kilo hecto deca BASE deci centi milli (meter, gram or liter) 100cm = ___ m100cm = ___ m 100cm = 1.0 m100cm = 1.0 m 6.9mm = ___cm6.9mm = ___cm 6.9mm =.69 cm6.9mm =.69 cm