In the ecological game of who eats who, one small change can have a big impact! Individuals create food chains in an array of ecosystems, then determine what happens to organisms in the chain when one organism changes its feeding...

It turns out blue is not just for the Smurfs! Introduce young geneticists to the Fugate family, known throughout Kentucky for their unusual skin tone. A two-day lesson from K20 explores dominant and recessive traits through partner...

Using an auger, start-up soil scientists bore a core of soil. They examine the sample and record the temperature at three depths in the borehole. This is an attractive activity sheet that succinctly guides your earth science class...

Physics lab groups finagle with laser lights to determine the critical angle of refraction for both water and Lucite. Because there are no detailed steps or an answer key for this enlightening exercise, an inexperienced physics...

After high schoolers have learned about electromagnetic induction, they can solve these 10 practice problems. They calculate magnetic field strength, magnetic force, electromotive force, and output voltage. This is a choice option as a...

Students discuss human behavior, sexual selection and the underlying genetic and evolutionary reasons for mate selection. The, in groups, they rate the attractiveness of certain individuals and measure facial features for symmetry.

Students investigate soil temperatures. In this graphing and earth science lesson, students insert temperature probes into different types of soil at varying depths. Students complete a data chart and construct a related graph...

Students investigate how to measure the speed of wind. They do this by building their own anemometers. Students calculate the air speeds while using their own projects and make observations. They conduct a mathematical discussion after...

Students utilize triangulation techniques to determine altitudes of objects. An altitude locator is constructed and used to determine the height of a building or a tree. Tangent tables and formulas provide the ratio for the formula to...

Students explore, experiment and analyze the concept of using dummies in a car crash test. They collaborate in a series of tests designed to simulate what really happens in a two-car collision. Each student incorporates probability,...

Young scholars test the pH of soil samples they collected from the field trip. In this chemistry instructional activity, students differentiate acids and bases. They write a lab report about the experiment.

Students make a simple sundial to examine the changes in shadows over time. In this sundial and shadow lesson, students make a simple sundial out of a manila folder and pencil. They observe how shadows change over time, and relate it to...

Students comprehend the four parameters of water quality. They perform tests for salinity, dissolved oxygen, pH and clarity or turbidity. Students comprehend why scientists and environmental managers monitor water uality and aquatic...

[Free Registration/Login may be required to access all resource tools.] Position vectors and identifying midpoints in 2 dimensions