About the Author

Michael Doig is a science teacher, web developer, and avid traveler who lives in Brooklyn, NY. He graduated from the University of Hawaii with a degree in Zoology and from Pace University with a Masters of Science in Teaching. He currently teaches Earth Science in a New York public high school.

ScienceBoom Episode #1 – Density Demonstration

Density is a measure of the amount of mass in a given volume. In this demonstration we visit the lab and look at the density of Pepsi versus Diet Pepsi. This is a very simple demonstration, but students love it.

Watch on: YouTube | Revver | Vimeo | Blip | Download

Host: Michael Doig
Duration: 3:51


  • Can of Pepsi
  • Can of Diet Pepsi
  • Fish Tank or Large Container for Water
  • Bag of Sugar
  • Packet of Equal
  • Spoon
  • Digital Scale or Triple Beam Balance

Density Fast Facts

  • Denisty = Mass/Volume (d=m/v)
  • Density of Water = 1.0 g/cm3
  • 1 milliliter (ml) = 1 cubic centimer (cm3)
  • Density greater than one sinks
  • Density less than or equal to one floats
  • Saturn is the only planet that would float if you placed it in water. It has a density of about 0.7 g/cm3


If you decide to perform this experiment with your class, you can use the following handout to have your students calculate the density of the two cans of soda.
Soda Pop Drop Handout

RSS Feed for This Post5 Comment(s)

  1. gravatarCheryl Luton | Feb 25, 2008 | Reply

    This is a great mini lesson on density! I provide resources and support for the alumni of an online university (teachers college) and plan to inform them of this resource.

    Cheryl Luton
    TC Alumni Mentor
    Western Governors University

  2. gravatarPaula Waldron | Jul 29, 2008 | Reply

    Wonderful mini lesson! This is a great resource for teachers who need to plan science demos for their students.
    Good luck on the site. I’ll be sure to recommend it to our science specialists!

  3. gravatarMichael Doig | Aug 7, 2008 | Reply

    Thank you for the feedback.

  4. gravatarKarin | Sep 8, 2010 | Reply


    This is a great demo on density. I tried to download the file, but episode 3 downloaded instead. Any idea how I can get episode 1??

  5. gravatarNegar | Aug 24, 2011 | Reply

    Hello there,
    This is a wonderful experiment. I am an instructor in post secondary education teaching applied science. I was wondering what kind of restrictions you have for using your material/ showing your videos, etc.
    Thank you

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