Search Results
Showing results 761 to 769 of 769
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-377.jpg?itok=aHA-kU6N)
Production of a Gas: Controlling a Chemical Reaction
Source Institutions
Learners mix vinegar and baking soda to produce a gas. With the addition of a bit of liquid soap, the gas becomes trapped in measurable bubbles.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-411.jpg?itok=CkO41tVb)
That's the Way the Ball Bounces: Level 3
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-000-000-001-528.png?itok=-_Pe3l3X)
Self-Assembly Game
Source Institutions
This is a quick game about self-assembly (page 2 of PDF under Self-Assembly Activity). Like the molecules of DNA, learners will self-assemble into a pattern by following a simple set of rules.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-401.gif?itok=nPz6ngNM)
The Senses of "Unknown Creatures"
Source Institutions
In this activity, learners use earthworms as "unknown creatures" from the South American jungle to find out how animals use senses.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-493.jpg?itok=UDGUbujD)
Skewers and Garden Poles
Source Institutions
In this activity, learners build scaled-down structures and cantilevers in a series of "building out" challenges with bamboo skewers and tape.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-174.jpg?itok=ZZ6_KJX-)
Outbreak!: Investigating Epidemics
Source Institutions
A group of learners simulates the spread of disease by trading slips of paper, one set of which has been treated with a baking soda solution.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-475.gif?itok=KzyyVCPv)
Lift Experiment
Source Institutions
In this experiment, learners investigate how the size of a wing affects lift. Learners count the number of pennies an egg crate plane wing can hold until the plane will no longer fly.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-969.jpg?itok=8V7JHi7w)
Keep it Cool
Source Institutions
In this activity, learners explore how engineers have met the challenge of keeping foods, liquids, and other items cool.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-099.png?itok=bQQLLgQR)
No-Slip Grip
Source Institutions
In this physical sciences activity, learners explore friction. Learners investigate the factors that affect the force required to move an object.