Presentation on theme: "How to Use a Triple- Beam Balance Next. Key Terms Mass - the amount of matter an object has. Matter- something that has mass and takes up space. Weight-"— Presentation transcript:
Key Terms Mass - the amount of matter an object has. Matter- something that has mass and takes up space. Weight- Depends on gravity. Weight is equal to mass X gravity. If gravity changes, so does the weight.
Parts of a Balance Pan Beams Thumbscrew Zero Mark Base Riders
Balance Setup Move all three riders so that they read ‘zero’. Make sure that there is nothing on the pan and that it is clean. pan Check to see if the balance reads zero.zero
Balance Setup If your balance isn’t reading zero so you need to turn the thumbscrew to adjust the balance until it reads zerothumbscrew
Balance Setup Your balance is ready to measure. Place object to be measured on the pan. Make sure that no part of the object is supported by the table.
Moving Riders Move the riders, beginning with the largest (middle). When moving a rider causes the balance to tip, move the rider back to the previous position. Move the next rider until it tips the balance (back/top). Place it back in the previous position. Move the final rider (front/bottom) until the balance reads zero.zero
Reading Riders Read each of the riders and add their masses together. The riders indicate the mass is: 373 g
Reading Riders When you read the last rider, notice that the smaller lines represent tenths.
Reading Riders 373.3 g This measurement is past the third line following the 3 on small rider. This indicates a mass of:
Reading Riders 373.35 g To maximize the number of digits in the measurement we estimate the last number. Since the rider is actually about halfway between 3.3 and 3.4, we record 3.35. ALWAYS USE UNITS (grams)