NARRATOR: Every object on this Earth,

Every substance that you see

Can be described and measured

By physical properties.

Like hardness, color, or malleability -

odor, length or temperature…or these magic three:

MASS, VOLUME, DENSITY: Mass, Volume, Density.

Three physical properties

Mass Volume Density

MASS: Hey everybody!

My name’s Mass.

I’m the amount of matter

in a solid, or a liquid, or a gas.

My unit is the kilogram.

The more force it takes to move me,

The more massive I am.

And let’s get this straight:

WEIGHT and MASS: Mass is not the same as weight!

MASS: I stay constant.

WEIGHT: As for me, I Change…depending on gravity!

MASS, VOLUME, DENSITY:

Mass, Volume, Density.

Three physical properties,

Mass, Volume, Density.

VOLUME: I am Volume. Call me V.

The space that something takes up—That’s me!

Tiny as a teardrop, large as the skies,

Or something in between— I’m a measure of size.

Milliliters or cubic centimeters.

Either way, I am 3D space.

A cool way to find me: Drop a thing in water,

How much water does it displace?

MASS, VOLUME, DENSITY:

Mass, Volume, Density.

Three physical properties,

Mass, Volume…

DENSITY:

and finally: Density, I’m Density—

How tightly packed your molecules are,

Like people in a subway car –

Are they close or are they far?

Density, I’m Density.

Does something float in the air or sea?

If the object has less density,

It floats! Buoyancy!

ROCK: “Maybe I have buoyancy!”

splash

MASS: What’s our connection? Excellent question!

VOLUME: We are related —like a family

DENSITY: If you know two of us, you can find the other!

MASS, VOLUME, DENSITY:

D = M divided by V!

Yeah! D = M/V!

MASS, VOLUME, DENSITY:

Mass, Volume, Density.

Three physical properties,

Mass, Volume, Density!