A song to help kids learn about three related physical properties: Mass, Volume, and Density.
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Voices
Mass: Leland Smith
Volume: Alexa Thompson
Density: Mark Gordon
Other voices: Matt Pace

Song by Sarah Hirsch, Matt Pace, & Joanna Pace
Artwork/animation by Ink An' Paper Studios
Music produced by Matt Pace
Title animation by Brenden Nelson

Special thanks to Jazmin Myres, Bennett Myres, Colin McLaren, and Macey Schlepp for your educational input!

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Lyrics:
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!

Copyright © 2023 Sarah Hirsch, Hopscotch