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Measuring Volume & Density. By: Brianna Shields September 14, 2005. DO NOW. 1. Name the unit used to label mass 2. What is the first step for using a triple beam balance? 3. What tool is used to measure length?. Definition. The amount of space a liquid takes up. Volume of a liquid.

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## Measuring Volume & Density

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**Measuring Volume & Density**By: Brianna Shields September 14, 2005**DO NOW**• 1. Name the unit used to label mass • 2. What is the first step for using a triple beam balance? • 3. What tool is used to measure length?**Definition**The amount of space a liquid takes up Volume of a liquid**Tool**Graduated Cylinder Volume of a liquid**Units**Milliliters (ml) Volume of a liquid**Formula**Read the volume level from the bottom of the meniscus Volume of a liquid**Definition**The amount of space a solid takes up Volume of an irregular solid**Tool**Graduated cylinder Volume of an irregular solid**Units**Milliliter (ml) Volume of an irregular solid**Formula**Measure the difference in water levels Volume of an irregular solid**Definition**The amount of space a cube takes up Volume of a cube**Tool**Metric Ruler Volume of a cube**Units**Centimeters cubed (cm3) Volume of a cube**Formula**Volume = length x width x height Volume of a cube**Example**• What is the volume of the liquid at left?**Example**• What is the volume of the liquid at left?**Example**• What is the volume of the cube at left?**Definition**The number of particles that can be packed into a space Density**Tool**Graduated cylinder or metric ruler AND triple beam balance Density**Units**G.C. = g/ml Ruler = g/cm3 Density**Formula**Density = mass divided by volume D =m/v Density v= l x w x h**How to calculate density**1. Find the mass in g 2. Find the volume in ml or cm3 3. Divide the mass by the volume 4. Round to the nearest tenth 5. Label answer with correct units Density**Water’s Density**1.0 g/ml Density of Water**Sink or Float?**When d > 1.0 g/ml = sink When d< 1.0 g/ml = float Density**Estimating**Density of sinking object is simply > 1.0 Density of floating object = % of object below water level Density**Cutting an object**Density of a pure substance is always the same regardless of size Density**Example**• What is the density of the object to the left if m=79.4 g, v= 29.8 cm3?**Which of the objects would sink? Float? Explain**Densities of Common Elements and Compounds Water = 1.0 g/ml Methanol= .79 g/ml Gold 19.30 g/ml Air= .0013 g/ml Iron= 7.8 g/ml Ice= .93 g/ml Mercury= 13.5 g/ml Aluminum= 2.7 g/ml Ethanol= .94 g/ml Oak= 0.85 g/ml Example**How would these materials layer in a container?**Densities of Common Elements and Compounds Water = 1.0 g/ml Methanol= .79 g/ml Gold 19.30 g/ml Air= .0013 g/ml Iron= 7.8 g/ml Ice= .93 g/ml Mercury= 13.5 g/ml Aluminum= 2.7 g/ml Ethanol= .94 g/ml Oak= 0.85 g/ml Example**Example**• This block has a density of 10.0 g/cm3. What is the density of the block at the left if it is cut in half?**Practice**• Work with your lab partner • Complete the volume and density practice questions in your handout • We will go over the correct answers next class

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