Name: Key
Date: _________________
6th Grade Science – Water Displacement/Density Study Guide
Period: _______________
Study Guide
(Test is on Wednesday, October 29, 2014)
1. The definition of volume is the amount of space an object or substance takes
up
2. How do you find the volume of a regular solid (ex: a tissue box)? Using a ruler;
length x width x height
3. How do you find the volume of an irregular solid (ex: a ball of clay)? Using a
graduated cylinder and the method of water displacement
4. What tools can you use to measure the volume of a liquid? To measure precise
volume of a liquid we use a graduated cylinder
5. The definition of mass is the amount of matter an object or substance contains
6. The formula for density is Density = Mass divided by Volume
7. The units for density are…
g/cm3 for solids
g/mL for liquids
8. What is the density of fresh water? (include units) 1 g/mL
9. An object has a volume of 200 cm3 and a mass of 150 grams. What is the density
of this object? 0.75 g/cm3 Will it float in fresh water? Yes, it will float.
10. An object has a mass of 35 grams and a volume of 15 cm3. What is the density of
this object? 2.33 g/cm3 Will it float in fresh water? No, it will sink.
11. What is the water displacement method? What does it measure? The water
displacement method is used to measure the volume of an irregular object.
Steps:
1) Measure the starting volume of the graduated cylinder
2) Measure the ending volume of the graduated cylinder once the object is
placed in
3) Subtract to find the difference
4) Convert to the proper unit (cm3)
12. A plastic block has a length of 7cm, a width of 2 cm, and a height of 3 cm. The
mass of the block is 84 grams. What is the density of this object?
V= L x W x H
D= M/V
V = 7cm x 3cm x 2cm
D= 84 g/42 cm3
V = 42 cm3
D = 2 g/cm3
13. Find the volume of the irregular solid:
Starting water level: 19 mL (include units)
Ending water level: 29 mL (include units)
The difference between the levels is: 10 mL (include units)
The volume of the object is: 10 cm3 (include units)