August 21

Hi Class:
Here is the link to today's lecture on precision and accuracy and error.
Vocabulary learned today:

2 types of error: Systematic and random
Instruments are devices used to analyze (measure: balance)
Machine do work (example: hot plate)

http://www.scribd.com/doc/259005/Final-Science-Measurements-Uncertainty-and-Error

We also covered the rules for significant digits.

Your homework was the 2 worksheets.

EXTRA CREDIT POINTS: (10 points)
Create a poster showing the rules for using significant digits. Neatest and artistry matter, s one of the posters will be displayed. Due date Thursday 8/23.

Next class w will learn about dimensional analysis.