Density

Density

I can Construct an explanation for how an object’s mass and volume determine if it sinks or floats in water

Learning Target

Essential Question

​What makes an object more or less dense?

Why?

Density is very important for the following:

Gold mining

Blood seperation (tests)

DNA extraction

Designing things from jewelry to sky scrapers

Density is a property of matter.

• A physical property of matter is simply something that can be observed or measured without changing the identity of a substance.

• Density is the amount of matter in a certain volume of substance.

• Density is how close particles are in an object (the density does not change no matter how much of the substance there is)

Multiple Choice

What is a physical property of matter?

• The amount of density an organism has

• Somethings that an object owns

• Something that can be observed or measured

• Something that can be inferred or not directly states

Multiple Select

What is density?

• The amount of matter within a certain volume

• How close together particles are in an object

• The amount of volume inside of water

• How close together protons are in an object

Multiple Choice

True or False: Weight determines density.

• True

• False

Draw

Draw an object's particles with low density.

Poll

How much do you understand what makes an object more or less dense?

• HELP

• I get it a little

• I get it

• I could teach the class about density

Match

Match the following

• Density

• Physical property

• atom

• proton

• Solid

The amount of mass in a certain volume

An observable or measurable characteristic

The smallest particle that something can be divided into

A positive particle

The most dense state of matter

• The amount of mass in a certain volume

• An observable or measurable characteristic

• The smallest particle that something can be divided into

• A positive particle

• The most dense state of matter

Multiple Choice

If an object has more density than water, it will

• sink

• float

• neither

Multiple Choice

If an object has less density than water, it will

• sink

• float

• neither

Water's density is 1000kg/cm³

More dense than water:

^{Glycerin- 1260kg/cm3}

^{Clay-2650kg/cm3}

^{Marble- 2750kg/cm3}

Reorder

Reorder the following from least to most dense

• 1000kg/cm ³

  ^(Water)

• 200kg/cm³

• 124kg/cm³

• 2345kg/cm³

• 209485kg/cm³

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

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

Why do ice cubes float in a  glass of water?

• the ice cubes are more dense than the water

• the water is more dense than the ice cubes

• the water is more dense than the glass

• the ice is more dense than the glass

Multiple Choice

A bobber floats on the water because it is....

• more dense than the water

• less dense than the water

• the same density as the water

• to show you when you have a bite

Multiple Choice

Why does the egg not sink or float?

• it is more dense than the water

• it is less dense than the water

• it has the same density as the water

• it is light

Multiple Choice

A brick sinks in water while a wooden block of the same size floats.  This is because the brick has a

• lower volume than the wooden block

• lower density than the wooden block

• higher volume than the wooden block

• higher density than the wooden block

Multiple Choice

If you poured 3 liquids that do not mix how could you tell which one is the most dense?

• The liquid on top

• The liquid in the middle

• The liquid at the bottom

Multiple Choice

Rocks sink because they are

• the same density as the water

• less dense than the water

• more dense than the water

• because they're round

Multiple Choice

Which liquid is the least dense?

• oil

• water

• syrup 

• plastic bottle

Multiple Choice

How dense something is compared with a reference material (example-an object sinking or floating in water).

• thermal energy

• relative density

• insulator

• physical state

Multiple Choice

Mass, Volume, Magnetism, Relative Density, Conductivity of Thermal Energy, Conductivity of Electrical Energy, and Solubility in Water are all...

• Properties of Matter

• States of Matter

• Types of magnetism

• Mass

Multiple Choice

A state of matter that has no definite shape but has a definite volume.

• solid

• liquid

• gas

• plasma

Multiple Choice

When the density of a substance is higher than the density of water the substance ______________ in water.

• Sinks

• Floats

Multiple Choice

When the density of a substance is lower than the density of water the substance _____________ in water.

• Sinks

• Floats

Multiple Choice

An object has a mass of 21 g and a volume of 3 cm³. What's it's density?

• 7 g/l

• 7 g/m³

• 7 g/cm³

• 7 g/cm

Multiple Choice

An object has a mass of 15 g and a volume of 3 cm³. What's it's density?

• 4 g/cm³

• 15 g/cm³

• 3 g/cm³

• 5 g/cm³

Multiple Choice

An object has a volume of 25 cm³ and a mass of 100 g. What's it's density?

• 20 g/cm³

• 100 g/cm³

• 5 g/cm³

• 4 g/cm³

Multiple Choice

An object has a volume of 6 cm³ and a mass of 42 g. What's it's density?

• 7 g/cm³

• 48 g/cm³

• 42 g/cm³

• 6 g/cm³

Multiple Choice

Which cube has a higher density?

• Red

• Blue