Introduction How To Measure Volume Of Liquid

Volume is the measurement of space taken up by something. Solids, liquids and glasses all take up space. Misconception on capacity may arise among the pupils while teaching Volume of Liquid.  In this task I will teach the pupils how to compare volumes of liquid by direct comparison. Hope this can give some ideas to the teachers on how to teach the topic effectively. The tools and methods for calculating liquid volume are different from that used for solids. For liquid volumes we would use a graduated cylinder, a dipstick or a flowmeter. Liquid in a container tends to curve at the edges. This curve is called the meniscus. Generally it curves down toward the center, but if there is an object in the cylinder, a straw for example, the liquid will curve up along the edges of that object. So it is important to set the cylinder so you sight along the top of the liquid. Take the reading from the center. which is the bottom of the curve. The smaller the volume of the cylinder the greater the curve will be. A burette card is simple to make and helps with the measurement. Take an index card and draw thick lines on it. Hold the card behind the cylinder at a level with the bottom of the curve, to get an accurate reading.  The formula for finding the volume of a cone is pi*height*radius2. The markings on the cylinder take this into account when they calculate the volume of the liquid at any given height. Each mark is a calculation of the height from the base * pi * the diameter--the cross-sectional area of the cylinder.