1. Chem-To-Go Lesson 4 Unit 1 DIMENSIONAL ANALYSIS

2.  Organized method of scientific calculation used in all upper level sciences  Start with a number and a unit  “Charts”  Units are marked out  Marked out units are diagonal and matching WHAT IS DIMENSIONAL ANALYSIS?

3. Calculate the number of minutes in 3.61 hours. Write the given. Draw the chart. Think of the relationship. Split the conversion factor in ½ at the equal sign. Arrange the conversion in the chart to cancel units. Multiply by the #s on top, and divide by the #s on bottom. TEACHING EXAMPLE

4. How many inches equal 10.7 cm? Write the given. Draw the chart. Think of the relationship. Split the conversion factor in ½ at the equal sign. Arrange the conversion in the chart to cancel units. Multiply by the #s on top, and divide by the #s on bottom. SECOND SIMPLE EXAMPLE

5. Calculate the # of seconds in 2 weeks. ADVANCED EXAMPLE