Density Review

Density Definition

the degree of compactness of a substance

We need MASS- the amount of MATTER in a given object

​We need VOLUME- the amount of SPACE something takes up

​

​Calculating Density

Multiple Choice

The amount of space an object takes up is its ___.

• mass
• volume
• length
• weight

Multiple Choice

The amount of matter in an object is its ___.

• mass
• volume
• length
• weight

Multiple Choice

Amy is trying to decide how many books she can fit in her backpack.  Is this mass or volume?

• mass
• volume

Multiple Choice

Eben is trying to decide whether he is strong enough to pick up the box of toys.  Is this mass or volume?

• mass
• volume

Multiple Choice

Michael had to make sure the box of parts wasn't too heavy to set on the chair.  Is this mass or volume?

• mass
• volume

Multiple Choice

Bram is looking for a new bed for his room.  If he is trying to decide if it will fit, is this mass or volume?

• mass
• volume

How do I calculate mass?

​Pretty easy, you weight it on a scale

There are only 2 units we use for mass....
g(grams) and kG (kilograms)

You find the "displacement" Put the object in a cylinder, and measure the before and after units, and the difference in the volume. in mL

​An irregular object

You measure Length x Width x Height measured in cm^3

​A cube or normal object

How do I calculate volume?

Multiple Choice

What is the volume of this prism?

• 24 cubic cm
• 240 cubic cm
• 60 cubic cm

Multiple Choice

Find the volume

• 1120 ft²
• 2011 ft²
• 120 ft³
• 1120 ft³

Multiple Choice

Let's practice! Before reads 50 mL. After we drop in the object, the new water level goes up to 60 mL. What is the volume of the blocks? (Hint: new volume- old volume)

• 8 mL

• 10 mL

• 60 mL

• 5 mL

Multiple Choice

What is the volume of the two red spheres? (Hint: new volume - old volume)

• 4 mL

• 6 mL

• 2 mL

• 8 mL

Multiple Choice

What is the volume of the ring? (new volume - old volume)

• 64 mL

• 68 mL

• 8 mL

• 4 mL

Ok, got it. So, how do I calculate density?

​D=M/V or...M= DxV or...V= M/V

Remember, units for
volume cm^3 OR mL
Mass g or kG
Density g/cm^3 or mL/g.......

Multiple Choice

What is the density of a liquid that has a mass of 27g and a volume of 30mL?

• 0.9 g/mL
• 3 g/mL
• 57 g/mL
• 810 g/mL

Multiple Choice

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

Multiple Choice

An eraser has a mass of 4g and a volume of 2cm³. What is its density?

• 8 g/cm³
• 2 g/cm³
• 1/2 g/cm³
• 24 g/cm³

Multiple Choice

A paper clip has a mass of 9g and a volume of 3cm³. What is its density?

• 3 g/cm³
• 1/3 g/cm³
• 27 g/cm³
• 39 g/cm³

Multiple Choice

What is the mass of a 25 cm³  liquid if it has a density of 5 g/cm³?

• 125 g

• 5 g

• $$\frac{5g}{cm^3}$$  

• $$0.2\ cm^3$$  

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

Keys to remember

​The density of water is 1.00 g/mL

If anything is higher than 1.00 g/mL, it will SINK
If anything is lower than 1.00 g/mL, it will float.
If it is "equal" to 1.00 g/ml, it will float/"flink"

Multiple Choice

Put the liquids in order from most dense to least dense?

• 4, 3, 2, 1
• 1, 2, 3, 4
• 3, 4, 2, 1, 
• 4, 3, 1, 2

Multiple Choice

Which liquid is the least dense?

• oil
• water
• syrup 
• plastic bottle

Let's review to make sure we got it!

Multiple Choice

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

Multiple Choice

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

• 8 g/cm³
• 2 g/cm³
• 1/2 g/cm³
• 24 g/cm³

Multiple Choice

What is the volume of Object X?

• 10.0 cm³
• 15.0 cm³
• 20.0 cm³
• 25.0 cm³

Multiple Choice

Why do some substances float on water?

• they are warmer than water
• they are cooler than water
• they are more dense than water
• they are less dense than water

Multiple Choice

What two types of measurements make up DENSITY? 

• Mass and Volume
• Temperature and Mass
• Grams and Centimeters
• Volume and Weight

Multiple Choice

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

• 7 mL
• 7 g/cm³
• 28 g/cm³
• 1/7 g/cm³

Multiple Choice

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

• 8 g/cm³
• 2 g/cm³
• 1/2 g/cm³
• 24 g/cm³

Multiple Choice

What is the formula for Volume?

• Mass/Volume

• Density x Volume

• Mass/Density

Multiple Choice

What is the formula for Mass?

• Mass/Volume

• Density x Volume

• Mass/Density

Multiple Choice

What is the volume of Object X?

• 10.0 cm³
• 15.0 cm³
• 20.0 cm³
• 25.0 cm³

Multiple Choice

What is the density of a plastic ball that has a volume of 6cm³ and a mass of 12g? 

• 2g/cm³
• .5g/cm_³
• 72g/cm³
• 4mL

Multiple Choice

What is the density of a book that has a mass of 400g and a volume of 600cm³?

• 1.5g/cm³
• 2400g/cm³
• 325mL
• .7g/cm³

Multiple Choice

What is the volume of the rock?

• 30cm³
• 10cm³
• 40cm³
• 20cm³

Multiple Choice

The amount of space something takes up

• density
• volume
• mass
• matter

Multiple Choice

You can measure ______ with grams.

• mass
• volume
• conductivity
• melting point

Multiple Choice

A crayon has a mass of 10.0 g and volume of 5.0 mL. What is the density?

• 30 g/mL

• 15 g/mL

• 1.0 g/mL

• 2.o g/mL

Multiple Choice

A piece of copper has a mass of 89g and a volume of 10.0 cm3. What would be the density of the copper?

• 0.89 g/cm3

• 89 g/cm3

• 8.9 g/cm3

• 890 g/cm3

Multiple Choice

What is the volume of 150.0 grams of lead if it has a density of 11.3 g/cm³?

• 13.3 g

• 13.3 cm³

• .075 g

• 1695 cm³

Multiple Choice

Calculate the mass of a substance which has a volume of 35.0 cm³ and a density of 0.50 g/cm³._{(All calculations should have the correct sig figs)}

• 17.5 g
• 0.014 g
• 18 g 
• 70. g

Multiple Choice

Calculate the density in the following question: A star has a mass of 15 g and a volume of 25 mL.

• 0.7 g/mL

• 0.6 g/mL

• 0.5 g/mL

• 0.4 g/mL

Multiple Choice

In a density column, is the substance with the highest density on the bottom or the top?

• Bottom

• Top

Multiple Choice

In a density column, is the substance with the lowest density on the bottom or on the top?

• Bottom

• Top

Multiple Choice

Which of the following is the correct definition of density?

• The amount of stuff in an object

• The amount of space an object takes up

• A measure of the force of gravity on an object

• The amount of matter (mass) packed into a space (object)

Multiple Choice

Which object has the highest density in this picture?

• A

• B

• C

Multiple Choice

Which object has the lowest density in this picture?

• A

• B

• C

Multiple Choice

A student knows the mass of an object. What other variable does the student need to know to calculate the object's density?

• Color
• Weight
• Volume
• Length

Multiple Choice

M =

• matter

• Massachusetts

• math

• mass

Multiple Choice

V =

• velocity

• volume

• vertex

• vacuole

Multiple Choice

D =

• diffusion

• decay

• decible

• density

Multiple Choice

A bar of copper has a mass of 216g and a volume of 24 cm3. What is the density of copper?

• 9g/cm3

• 5184g/cm3

• .11g/cm3

• 322mL

Multiple Choice

What two types of measurements make up DENSITY? 

• Mass and Volume
• Temperature and Mass
• Grams and Centimeters
• Volume and Weight

Multiple Choice

If an object has a density of .6 g/mL and you put it into water, will it sink or float?  

• sink
• float

Multiple Choice

If an object has a density of 3.6 g/mL and you put it into water, will it sink or float?  

• sink
• float

Multiple Choice

Using the picture, tell me which object is the least dense and why?

• The fish because he is in the middle

• The cork because it is floating at the top of the water

• The rock because it is at the bottom

• The cork and the rock because they have the same about of atoms.