Activity
American Chemical Society

Inquiry in Action: Changing the Density of a Liquid: Heating and Cooling

For Teachers 9th - 10th
In this activity, students will investigate whether the temperature of water affects its density. Students will place colored hot and cold water in a cup of room-temperature water to see that cold water sinks while hot water floats. Then...
Lesson Plan
TeachEngineering

Teach Engineering: Floaters and Sinkers

For Teachers 6th - 9th
This lesson introduces students to the important concept of density. The focus is on the more easily understood densities of solids, but students can also explore the densities of liquids and gases. Students devise methods to determine...
Lesson Plan
Science Education Resource Center at Carleton College

Serc: Density of Solid Objects

For Teachers 9th - 10th
In this science inquiry, students investigate whether volume or density of objects determine the floating or sinking in water. Using a rock and a block of wood teachers engage students in the discussion of density, mass and volume.
Lesson Plan
PBS

Pbs Learning Media: Sesame Street: Sink or Float Educator Guide

For Teachers Pre-K - 1st
This is an educator's guide for a unit on things that sink or float. It includes lesson plans, experiments, and activities. Students apply the scientific method as they investigate whether objects sink or float.
Activity
Science is Fun

Science Is Fun: Sinking and Floating Soda Cans

For Students 4th - 6th
An experiment to determine if either a regular or a diet can of soda will float or sink when placed in water, and what causes this.
Lesson Plan
Science Education Resource Center at Carleton College

Serc: Mn Step: Sink or Float? Inquiry Investigation

For Teachers K - 1st
For this activity, learners make predictions about whether different objects float or sink, then test them. They are asked to record their observations and results for each, and compare their results to others'.
Lesson Plan
Science Education Resource Center at Carleton College

Serc: Mn Step: Sinking and Floating Water

For Teachers 3rd - 5th
An experiment in density where colored water, both hot and cold, are poured into containers of water at room temperature. Learners will observe that the warm water rises and the cold water sinks due to their different densities.
Activity
Science is Fun

Fun Science: Bowling Balls: Sink or Float?

For Students 9th - 10th
For a dramatic illustration of density check out this demonstration. It's simple to do, only requiring a bowling ball and some water.
Lesson Plan
Alabama Learning Exchange

Alex: Teaching Measurement: Literature and Manipulatives

For Teachers 3rd - 5th
The tradebook, Who Sank the Boat? by Pamela Allen, is an excellent tool in teaching measurement. Students will engage in activities involving different types of measurement. In the story, five animal friends decide to take a boat ride....
Lesson Plan
HotChalk

Hot Chalk: Lesson Plans Page: Sink or Float?

For Teachers K - 1st
This lesson plan is designed to have young children explore the concept of sinking vs. floating by using the skills of prediction, observation and classification.
Activity
Science is Fun

Science Is Fun: The Cartesian Diver

For Students 3rd - 5th
A simple experiment in buoyancy where you discover how to make a packet of sauce or candy float or sink at will, and why you are able to do this.
Lesson Plan
Utah Education Network

Uen: 1st Grade Act. 24: Interactive Writing

For Teachers K - 1st Standards
In this lesson, students will listen to nonfiction books about items that sink and float. Students will participate in filling in words to fill in a teacher-created chart that is connected to the information. Students will then write a...
Lesson Plan
National Association of Geoscience Teachers

Nagt: Density Mystery Canisters

For Teachers 4th - 6th
Learners experiment with items that sink or float, and learn that water's density is equal to one, and objects/solutions with a density greater than one will sink, and those with a density less than one will float.
Interactive
University of Colorado

University of Colorado: Ph Et Interactive Simulations: Balloons & Buoyancy

For Students 9th - 10th
Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.
Activity
Middle School Science

Mss: Density Demonstration: Coke vs. Diet Coke

For Teachers 6th - 8th
In this demonstration, students will brainstorm to find a solution as to why Diet Coke floats and Coke sinks. Through this exercise students will arrive at a definition of density.
Activity
Science is Fun

Fun Science: Sinking and Floating Soda Cans

For Students 9th - 10th
Why do some pop cans float in water while others don't? This easy experiment is a great example of the principle of density.
Activity
American Chemical Society

Inquiry in Action: Compare the Density of an Object to the Density of Water

For Teachers 9th - 10th
In this activity, students use tea light candle holders and a student-made balance to compare the weight of equal volumes of wax, water, and clay. Students will discover that since the wax weighs less than an equal volume of water, it is...
Graphic
American Chemical Society

Middle School Chemistry: Density Sink and Float for Solids

For Students 9th - 10th
See how different solids can have different densities depending on their molecular make-up.
Graphic
American Chemical Society

Middle School Chemistry: Density Sink and Float for Liquids

For Students 9th - 10th
See how different liquids can have different densities depending on their molecular make-up.
Interactive
University of Colorado

University of Colorado: Ph Et Interactive Simulations: Balloons & Buoyancy

For Students 9th - 10th
Students studying buoyancy will better understand its concepts with this virtual experiment using various balloons and testing what makes them float or sink.
Interactive
Center for Innovation in Engineering and Science Education, Stevens Institute of Technology

Stevens Institute of Technology: Buoyancy Simulation

For Students 9th - 10th
By choosing the mass, size, and time, students can experiment with whether the block floats or sinks in this simulation. Students have the option to display the forces and add a second block to the tank. Density is also shown to allow...
Lesson Plan
American Chemical Society

Middle School Chemistry: Chapter 3: Density

For Teachers 9th - 10th
Six interactive chemistry lessons about density complete with handouts and animations.
Interactive
Sesame Street

Sesame Street: Games

For Students Pre-K - 1st
Help the Sesame Street characters while completing various early learning tasks. Students will develop language, reasoning skills, and independence as they play the games provided.
Interactive
PBS

Pbs: Sesame Street: Science

For Students Pre-K - 1st
A collection of interactives, videos, and documents on a variety science concepts.

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