Density and Buoyancy Activity: Diving Ketchup

Rated 4.82 out of 5, based on 34 reviews
34 Ratings
Science in the City
Grade Levels
7th - 10th
Formats Included
  • PDF
8 pages
Science in the City


This DIFFERENTIATED lesson is an EASY AND FUN way to introduce or reinforce density, and also a great way to reinforce the scientific method and experimental design. There are multiple versions included: a teacher demonstration or student-centered demonstration of the principle of density. It is a great demonstration/discrepant event to engage students at the start of a unit. Also included are directions to do this activity as scientific inquiry, and for students to work through the process of designing an experiment.

This project fits will during a unit on either density, applications of density, early in the year for experimental design, or to wrap up the year and reinforce experimental design with a fun project.

See an example HERE

**All pictures, graphics, and artwork in our lessons are either purchased legally for use or are created by Science in the City**

Terms of Use:

- The purchase of the product is for single classroom use by the purchaser only. It is a violation for individuals, schools, and districts to redistribute, edit, sell or post this item on the Internet or to other individuals. Disregarding the copyright is a violation of the Digital Millennium Copyright Act and subject to legal action.

-By purchasing this product you acknowledge that you have read and understood the Terms of Use.

You may also be interested in:

Interactive Notebook - Variables lesson Plan and Practice

Chemical Weathering AND Science Process Skills

Pack of 50 Exit Tickets


Don't forget that leaving feedback earns you points toward FREE TPT purchases.

Also, follow me and be notified when new products are uploaded.

Please feel free to contact me with any questions.


Science in the City Blog | Instagram | Pinterest | Facebook

Total Pages
8 pages
Answer Key
Does not apply
Teaching Duration
2 hours
Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT’s content guidelines.


Questions & Answers


TPT empowers educators to teach at their best.

More About Us

Keep in Touch!

Sign Up