Measurement

Measurement

Liquid Volume (L) Objectives

Define liquid volume. Memorize the basic unit for liquid volume: Liter (L) Learn nonstandard measurements to approximate metric volume measurements. Learn and use proper procedure to measure liquid volume using a graduated cylinder.

Demonstrate accuracy using a graduated Habits of the Mind Striving for Accuracy Persisting

Titan Creed Striving to be our best, do our best Vocabulary

Graduated Cylinder the instrument used to measure liquid volume Measurement - determining the amount or quantity of something by comparison with a standard Meniscus - the curved surface at the top of the liquid; the bottom of the meniscus is used to measure the volume of a liquid.

Scale - a system of ordered marks at fixed intervals used as a reference standard in measurement Vocabulary LIQUID volume: The holding capacity of a container; the amount of liquid BASIC UNIT: liter (L) Liquids/gases are measured in liters (L)/milliliter (mL).

Note: What state of matter is not measured with this unit? Nonstandard Measurement UNIT Approximation milliliter

20 drops liter of a 2 Liter soda bottle Video Measuring Liquid Volume Reading a Graduated

Cylinder Read the scale from the bottom of the meniscus when measuring the volume of a liquid. Meniscus - curved surface of a liquid in a narrow cylindrical container REMEMBER! Estimate 1 place beyond the capability of the measuring device!

Adhesion of Water Molecules When you pour liquid into a container, the adhesion, or attraction, of the water molecules to the sides of the container causes the water molecules to get pulled up the side of the container. Meniscus - curved surface at the top of the liquid

Increment Formula Ending Value - Starting Value Number of Increments = Scale

Accuracy and Precision Accuracy - how close a particular measurement is to the correct value or a standard Precision - the consistency of repeated measurements o Data with a small range = more precision o Grouping of the data is close Reading a Graduated

Cylinder Step 1: Place the graduated cylinder on a flat surface. Step 2: Determine the scale. Subtract the values of any two adjacent labeled graduations. Divide by the number of steps. Reading a Graduated

Cylinder Step 3: Get perpendicular or eye level to the bottom of the meniscus. CORREC INCORRECT Step 4: UseT the scale you just found to measure the liquid using the lowest part of the meniscus! Estimate 1 place beyond the capability of the graduated cylinder.

Lets Try Together Determine the scale Subtract the values of any two adjacent labeled graduations. Divide by the number of steps. Locate the meniscus Use the scale to measure the liquid using the lowest part of the meniscus!!

Estimate 1 place beyond the capability of the graduated cylinder. Finalizing Liquid Amounts Whiteboard Practice 1. Scale: _____ 3. Scale: _____

5. Scale: _____ 2. mL: _____ 4. mL: _____ 6. mL: _____ Whiteboard Practice

7. Scale: _____ 9. Scale: _____ 11.Scale: _____ 8. mL: _____ 10. mL: _____ 12. mL: _____

Graduated Cylinder Practice 1. 2. 3. 4.

Practice the proper technique to read the amount of liquid in the graduated cylinder. Compare your answer to your partner. Compare your answer to the answer on the card. Rotate to the next station. Download Think/Pair

How do we accurately measure using a graduated cylinder? Activity: Color Challenge Objective: Demonstrate accuracy using a graduated cylinder. Materials: 3 beakers with colored water (red, blue, and yellow) 1 beaker (tap water)

3 graduated cylinders (various sizes) 1 pipette 6 test tubes labeled A, B, C, D, E, and F 1 test tube rack Activity: Color Challenge Directions: 1. Perform each step outlined below using accurate measurements. Do them in order.

2. Use the pipette for accuracy. 3. Rinse the graduated cylinder using the pipette (after each use) with water to prevent cross-contamination. NOTE: #10 Show teacher final amounts before Titan Creed Striving to be our best, do our best

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