Calculating Density

Density Practice

6th Grade Science

Watch this video for an explanation of calculating Density.

Multiple Select

Check all the parts of the formula that you need to calculate density

• Mass

• Force

• Acceleration

• Volume

To Calculate Density You NEED:

• Mass

• Volume

Multiple Choice

What is the formula for Density?

•  $Density\ =\ Volume\ \div Mass$  
  

•  $Denisty=Volume\ \times Mass$  

•  $Density=Mass\div Volume$  

 $Density\ =\ Mass\div Volume$  

This is the formula for Density

Multiple Choice

What is the Density of water?

• 100 g/ml

• 1 g/ml

• 2 g/ml

• 1.5 g/ml

1 g/cm³ or 1 g/ml

This is the Density of water

Float or Sink?

You will have 30 seconds to decide if the object will float or sink in water. (REMEMBER THE DENSITY OF WATER IS 1)

Multiple Choice

The density of ice is 0.93 g/ml. Will ice float or sink in water?

• Float

• Sink

Multiple Choice

The density of the metal tin is 5.75 g/cm³ , will tin float or sink in water?

• Float

• Sink

Multiple Choice

The density of gasoline is 0.74 g/cm³, will gasoline float or sink in water?

• Float

• Sink

Multiple Select

Check all items that will sink in water.

• Wood has a density of 0.85 g/cm³

• Aluminum has a density of 2.7 g/cm³

• Lithium has a density of 0.53 g/cm³

• Gold has a density of 19.3 g/cm³

Open Ended

The density of different objects are shown in the table. If the density of water is 1g/ml, which of the objects will float in water and which will sink?

 $Density\ =\ Mass\div Volume$  

This is the formula for Density

Tips for Calculating Density

• First find the mass and the volume

• Divide the Mass by the volume

Multiple Choice

A bar of copper has a mass of 216g and a volume of 24 cm3. What is the density of copper? (You can use a calculator)

• 9g/cm3

• 5184g/cm3

• .11g/cm3

• 322mL

Multiple Choice

Frank has an eraser. It has a mass of 4 g and a volume of 2cm³. What is the density?

• 2 g/cm³

• 4 g/cm³

• 8 g/cm³

• 2 g/in³

Multiple Choice

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL

• 7 g/cm³

• 28 g/cm³

• 1/7 g/cm³

Calculating for Volume

There will be questions that ask you to find the volume before you can calculate Density.

How to calculate Volume:

If you are given an image like the one shown here. You have to subtract the number the water rises to minus the number the water started at. It rises to 35 and started at 30 in the image so the volume is 35-30 which is 5.

Multiple Choice

A scientist is trying to calculate the density of green jade. He first must calculate the volume. The image shows the amount of water that is displaced by the green jade. Use this information to calculate volume.

• 11.5 mL

• 7.25 mL

• 10.5 mL

• 5.0 mL

Multiple Choice

What is the volume of the yellow block?

• 10 mL

• 15 mL

• 20 mL

• 5 mL

Multiple Choice

It is the amount of space occupied by the object

• volume

• density

• mass

• liquids

Multiple Choice

Calculate the Volume: (Remember the formula to calculate volume l x w x h)

• 84 cm³

• 420 cm³

• 60 cm³

• 144 cm³

Calculating for Mass

There will be questions that give you a triple beam balance picture to find the mass before calculating for Density.

Multiple Choice

What does this triple beam balance read?

• 285.2 g

• 282.5 g

• 280.2 g

Fill in the Blank

What does this triple beam balance read?

Fill in the Blank

What does this triple beam balance read?

Putting it all together to calcuate Density

• First use the image to find Volume

• Then use the image to find Mass

• Finally Divide the Mass by the Volume

Multiple Choice

An irregularly shaped rock was lowered into a graduated cylinder holding a volume of water equal to 50 ml. The height of the water rose to 75 ml. If the mass of the stone was 250 g, what was its density?

• 15 g/mL

• 5 g/mL

• 10 g/mL

• 20 g/mL

Multiple Choice

An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?

• 9 g/mL

• 10.5 g/mL

• 6.5 g/mL

• 8 g/mL

Multiple Choice

If a block of wood has a density of 0.6 g/cm³ and a mass of 120 g, what is its volume?

• 200 cm³

• 0.005 cm³

• 250 mL

• 72 mL

Multiple Choice

The density of this material is 2 g/cm³.
There are 24 cm³  Find the total mass.

• 12 grams
• 48 grams
• 12 g/cm³
• 48 g/cm³