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Which Powder is It?
Source Institutions
In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders.
![](/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-000-000-005-533.jpg?itok=wKQxv-bv)
Magnetic Sensory Bottles
Source Institutions
In this activity learners will investigate magnetic and non-magnetic items in a sensory bottle.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-976.png?itok=sLSbJoNT)
Finding Colors
Source Institutions
In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-336.png?itok=2cQHulSq)
Carrying Charges: Testing for Conductivity
Source Institutions
Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-520.jpg?itok=9MAH2IlY)
Measuring with Flubber
Source Institutions
In this activity learners will measure and manipulate flubber using different tools. Learners will explore volume and make observations about texture and shapes.