Volume - PowerPoint PPT Presentation

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Volume

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... Water Displacement Method How does the water displacement method work? 1.Record the volume of water in the first beaker or graduated cylinder Example: 20 ml 2. – PowerPoint PPT presentation

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Title: Volume


1
Volume
  • Volume of Rectangular Solids

2
Common Conversions For Volume Common Conversions For Volume Common Conversions For Volume
1 L
1,000 cm³
1 mL
1,000 mL
1 L
  • 1 cm³

3
  • Measuring the Volume of Solid or Irregular Objects

4
How can the volume of a solid object such as a
shoebox be measured?
  • To measure solid objects that are regular shape,
    a formula for volume can be applied

5
The formula for calculating the volume of a
rectangular object is
  • Volume Length x Width x Height
  • Volume L x W x H
  • Volume 3cm x 15cm x 4cm
  • Volume 180 cm³

6
Why is the unit cm³ used when calculating the
volume of a rectangular object?
  • When multiplying the objects length, width and
    height, the cm units are also multiplied by 3
  • Example cm x cm x cm cm³

7
The SI unit known for measuring solids with a
larger volume is known as the
  • Cubic meter m³

8
What is a cubic meter?
  • The SI unit used to measure solids with a larger
    volume
  • A cubic meter is equal to the volume of a cube
    that measures 1 meter on each side
  • m x m x m m³
  • Hint Think of a big box whose 3 sides measure 1
    meter each

9
Suppose a cereal box is 10 centimeters long, 4
centimeters wide, and 20 centimeters high. What
would be the volume of the box?
  • Volume Length x Width x Height
  • Volume 10 cm x 4 cm x 20 cm
  • Volume 800 cm³

10
Volume
  • Volume of Irregular Solids

11
How is the volume of an irregular solid such as a
rock measured?
  • To measure the volume of an irregular solid,
    immerse the object in water, and measure how much
    the water level rises
  • This method is called the
  • Water Displacement Method

12
How does the water displacement method work?
  • 1.Record the volume of water in the first beaker
    or graduated cylinder
  • Example 20 ml
  • 2. Carefully place the irregular solid into the
    water. Record the volume of the water plus the
    object
  • Example Now the volume is 32 ml
  • 3.Subtract the volume of the water alone from the
    volume of the water plus the object
  • Example 32 ml 20 ml 12 ml

13
Water Displacement
  • Problem
  • The graduated cylinder has 22 ml of water
  • When you add the rock, the water rises to 33 ml.
  • What is the volume of the rock?
  • 33 ml 22 ml 11ml
  • The volume of the rock is 11 ml
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