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MEASURING volume

MEASURING volume. With a graduated cylinder. All images courtesy of Google Images and are under Creative Commons Licensing. What is volume?. T he amount of 3 dimensional space occupied by an object. All images courtesy of Google Images and are under Creative Commons Licensing.

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MEASURING volume

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  1. MEASURING volume With a graduated cylinder All images courtesy of Google Images and are under Creative Commons Licensing

  2. What is volume? The amount of 3 dimensional space occupied by an object. All images courtesy of Google Images and are under Creative Commons Licensing

  3. Measuring volume In this lesson, we will be measuring the volume of a liquid using a graduated cylinder. To read the volume of a liquid you must read the measurement based on the bottom of the meniscus. All images courtesy of Google Images and are under Creative Commons Licensing

  4. What causes the meniscus? A meniscus can occur with a liquid in any container. You’ll notice the meniscus on the curved surface of a column of liquid. It is a concave meniscus if the molecules of the liquid are attracted to the container walls and convex if they are not. Concave meniscus you must read the graduated cylinder at eye-level to record the most accurate measurement. All images courtesy of Google Images and are under Creative Commons Licensing

  5. Metric units & Measuring volume The graduated cylinders we will use today will measure in milliliters (mL), which are metric units. How many milliliters of liquid are in this cylinder? _______ 20 mL 1 liter (L) = 1000 milliliters (mL) All images courtesy of Google Images and are under Creative Commons Licensing

  6. Measuring volume To measure a liquid, you first carefully pour it into the graduated cylinder. Tipping the cylinder gently to one side will help the liquid not splash out and prevent bubbles from forming. Then, at eye-level, read the liquid volume at the bottom of the meniscus. Always make sure that your graduated cylinder is sitting on a level surface to ensure an accurate measurement. All images courtesy of Google Images and are under Creative Commons Licensing

  7. Let’s Practice! Look at the graduated cylinder below, what is the volume of the liquid inside? 43 mL _________ All images courtesy of Google Images and are under Creative Commons Licensing

  8. Measuring volume Now we will practice measuring various volumes of liquids. Draw the following chart in your science journal. Measure the volume of the liquid in each jar using your graduated cylinder. Be sure to account for the meniscus! Now organize the jars from the least amount of volume to the most by listing them in order in your science journal. All images courtesy of Google Images and are under Creative Commons Licensing

  9. Let’s review… 1. What is volume? The amount of 3 dimensional space occupied by an object. 2. What metric unit did we measure with? milliliters. 3. How do you read a graduated cylinder? At eye-level and read the bottom of the meniscus. 4. What should you do with the graduated cylinder before measuring the volume of a liquid? Make sure it’s sitting on a level surface.

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