Measurement Lab Equipment El Paso （厄尔巴索实验室测量设备）.pdfVIP

Measurement Lab Equipment Abstract This lab reviews the concept of scientific measurement, which you will employ weekly throughout this course. Specifically, we will review the metric system so that you will be able to measure length, mass, volume and temperature in metric units, and convert between the English and metric systems. You will also familiarize yourself with common laboratory equipment. You will review and practice scientific notation so that you will understand its use in scientific measurement. Finally, you will utilize basic statistical methods to evaluate data that you gather and graph. The sections entitled “Putwhat you have read into Practice” will be due as homework next week. Whatever you do not complete during the lab period should be completed at home. Conversions within the Metric System Introduction Length, Mass, Volume To convert within the metric system, you must remember the following: To convert between metric units, you will need to move the decimal to the right or to the left, relative to where you begin, as shown by this chart. This means that you will need to add a decimal to the end of any whole number! For instance “35” is the same as “35.” Example 1: Convert 5 mg to g. To get from mg to g requires you to move to the left on the chart 3 units, thereby moving the decimal to the left 3 units. Therefore the value will be 0.005 g. Example 2: Convert 80 hectoliters to centiliters. To get from hector- to centi- requires you to move to the right 4 units. Therefore the number will become 800000 cl. 1 Example 3: Convert 400 ml to nl. To get from milli to nano requires you to move 6 units to the right. Notice that we are referring to the exponent associated with 10 when we count places to move the decimal--‐ we are not counting actual words listed on the chart. Therefore 400ml becomes 400,000,000 nl. *M