Measurement & Chemistry - Sept 11 Class

In friday's lesson we learned the 7 Fundamental Units, Prefixes & SI units, and Significant Digits.

- Accurate measurements are essential in the scientific method.
- The SI system (System International) is the most common system in use today.
- France started the metric system about 300 years ago.

7 Fundamental Units (*need to know or most likely to use)

• Mass* (kg)
• Distance* (m)
• Time* (s)
  
• Temperature* (K)
  
• Amount* (mol) ----> 6.02 x 10^23
  
• Current (A)
  
• Luminosity (cd)

Prefixes & SI Units

Use the prefixes to convert the symbols!


Significant Digits
1. Digits 1-9 are always significant.
2. Zeros are significant if they are right of the decimal.

EX. 2.010-->ALL 4 digits are significant compared to 0.002-->ONLY the "2" is significant.