Search Results
Showing results 1 to 9 of 9
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-330.jpg?itok=ItPXDz8V)
Changing the Density of a Liquid: Adding Salt
Source Institutions
Learners see that a carrot slice sinks in fresh water and floats in saltwater.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-972.png?itok=MsgPm-Ze)
The Liquid Rainbow
Source Institutions
Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-682.jpg?itok=9HXjoYow)
How Big is Small
Source Institutions
In this classic hands-on activity, learners estimate the length of a molecule by floating a fatty acid (oleic acid) on water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-691.gif?itok=vGNSc8W1)
Percentage of Oxygen in the Air
Source Institutions
In this activity, learners calculate the percentage of oxygen in the atmosphere by using steel wool's ability to rust.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-732.jpg?itok=8QJMTSy8)
Having a Gas with Cola
Source Institutions
In this activity, learners measure the amount of carbon dioxide in a carbonated drink.
Stability of Egg White Foams
Source Institutions
In this chemistry meets cooking activity, learners compare the stability of egg white foams with various additives.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-415.jpg?itok=isZ2wcuK)
That's the Way the Ball Bounces: Level 2
Source Institutions
In this activity, learners prepare four polymer elastomers and then compare their physical properties, such as texture, color, volume, density, and bounce height.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-394.gif?itok=3SCajlHq)
What's So Special about Water: Solubility and Density
Source Institutions
In this activity about water solubility and density, learners use critical thinking skills to determine why water can dissolve some things and not others.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-651.jpg?itok=voooaDLp)
Ready, Set, Fizz!
Source Institutions
In this activity, learners explore the chemical reaction between water and effervescent antacid tablets. This hands-on activity models how a material can act differently when it's nanometer-sized.