1. Volume of Rectangular Solids

2. Common Conversions For Volume=
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. Example: cm x cm x cm = cm³
Why is the unit cm³ used when calculating the volume of a rectangular object?
When multiplying the object’s 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. m x m x m = m³ 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. Volume = Length x Width x Height
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 of Irregular Solids

11. Meniscus

12. 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

13. 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

14. 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