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Does Coke Float?

Time Frame:
1 class period that runs 15 minutes.

Group Size:
Large Groups


The students will predict if these items will float or sink. Coke, Diet Coke, and Diet Caffeine Coke.

Main Curriculum Tie:
SEEd - Grade 6 (2017)Strand 6.2: Energy Affects Matter
Matter and energy are fundamental components of the universe. Matter is anything that has mass and takes up space. Transfer of energy creates change in matter. Changes between general states of matter can occur through the transfer of energy. Density describes how closely matter is packed together. Substances with a higher density have more matter in a given space than substances with a lower density. Changes in heat energy can alter the density of a material. Insulators resist the transfer of heat energy, while conductors easily transfer heat energy. These differences in energy flow can be used to design products to meet the needs of society.


  • one can of unopened Coke, Diet Coke, and Diet Caffeine Coke
  • an aquarium 3/4 full of room temperature water
  • over flow can
  • calculator

Instructional Procedures:
Special teacher procedures, safety notes, and suggestions:

  • Ask the students to predict if each will float or sink. Put them into the aquarium one at a time.
  • Let them change their answer if they want.
  • The actual assignment is to go home and bring back an explanation as to why this happened. They can use the Internet, toll free phone number on the cans, or anyone over 18 to help.

Assessment Plan:
If they mention the word density give them full credit. Talk about the idea that Nutra-sweet that is used in Diet Coke is 1000 times sweeter than sugar so less is needed in the can. You can actually figure out the density of each can using water displacement.

Lesson Design by Jordan School District Teachers and Staff.

Utah LessonPlans

Created Date :
Sep 30 2014 08:39 AM