Search Results
Showing results 1 to 20 of 29
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-597.png?itok=26ZaSQm5)
Water Body Salinities I
Source Institutions
In this activity, learners investigate the different salinity levels of oceans, rivers and estuaries.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-861.gif?itok=umup6nux)
Modeling Limits to Cell Size
Source Institutions
This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-652.gif?itok=7LxXKYAD)
Life Size: What's in a microbe?
Source Institutions
In this activity on page 3 of the PDF, learners visualize the relative size and structural differences between microbes that have the potential to cause disease.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-778.jpg?itok=ays5VRr-)
Clean Water: Is It Drinkable?
Source Institutions
In this activity, learners simulate nature's water filtration system by devising a system that will filter out both visible and invisible pollutants from water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-650.gif?itok=icGlDqOX)
Gel Electrophoresis
Source Institutions
In this activity, learners simulate the process of DNA fingerprinting by using electricity to separate colored dyes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-318.png?itok=GBOcABjZ)
Desert Water Keepers
Source Institutions
In this outdoor, sunny day activity, learners experiment with paper leaf models to discover how some desert plants conserve water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-595.png?itok=APN6aP0C)
Do Cities Affect the Weather?
Source Institutions
In this activity, learners explore clouds and how they form.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-577.png?itok=GB5mTtYM)
Wetlands
Source Institutions
Learners create a model of a wetland to observe how it absorbs and filters water from the environment.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-600.jpg?itok=PHl8rFHc)
Single-Cell Life
Source Institutions
In this activity, learners create a soil and water model of a single-cell life environment and study living microorganisms.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-969.jpg?itok=CNeE150p)
Make a Terrarium
Source Institutions
In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-502.jpg?itok=g7gVRAfm)
The Great Plankton Race
Source Institutions
In this activity, learners are challenged to design a planktonic organism that will neither float like a cork nor sink like a stone.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-639.gif?itok=wc97pwUq)
Evolution in Plane Sight
Source Institutions
In this activity, learners model directed evolution by making paper fly. Learners construct and fly paper airplanes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-248.png?itok=J97MiK3J)
Visualizing How the Vestibular System Works
Source Institutions
In this activity (page 59 of the PDF), learners spin and observe false eyelashes in jars of water (prepared at least 1 day ahead of time) to investigate the effects of different types of motion on the
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-371.png?itok=vfQ8oK5z)
Make a "Mummy"
Source Institutions
The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-326.jpg?itok=toqnVUAO)
Solar Water Heater
Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-810.jpg?itok=tRx_e-Ac)
Earth Atmosphere Composition
Source Institutions
In this activity, learners use rice grains to model the composition of the atmosphere of the Earth today and in 1880. Learners assemble the model while measuring percentages.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-578.png?itok=n5fKySp8)
Estuaries
Source Institutions
An estuary is a body of water that is created when freshwater from rivers and streams flows into the saltwater of an ocean.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-407.jpg?itok=hhLVUNqt)
Gene Switches
Source Institutions
In this activity, learners explore how genetic switches function and the role of genetic switches in the process of evolution.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-246.png?itok=wJ75YDaY)
Building a Magic Carpet
Source Institutions
In this activity (page 89 of the PDF), learners compare and contrast pitch and roll motions by using a Magic Carpet maze similar to one that was used for Neurolab investigations about microgravity.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-953.gif?itok=PXODLPi7)
How Greenhouse Gases Absorb Heat
Source Institutions
Learners observe two model atmospheres -- one with normal atmospheric composition and another with an elevated concentration of carbon dioxide.