Transmitter Hunt

After reading about radio transmission, application, and the difference between AM and FM, small teams of engineers use a kit to construct an FM radio and then send and receive broadcasts. This is an ideal activity for middle school STEM...

A radio receives radio signals, converts them to an electrical signal, then converts this signal to a sound signal, and amplifies the sound so people can hear it. Class members use this information to create a short-wave radio antenna...

These six multiple-choice questions ask pupils to evaluate the energy, wavelength, and frequency of particular electromagnetic wavelengths. Further questions then require them to apply their knowledge and convert certain values or give...

A combination of informative text, photos, and graphics comprise this sharp show on electromagnetic radiation. Some slides mention hands-on activities for demonstrating concepts, so if you want to include them you will need to figure out...

The Cold War presented some communication challenges to the US military. Because the conflict was before the launch of satellites, scientists focused on the earth's natural satellite, the moon, the bounce radio signals. A video lesson...

Radio waves are all around us! How do they transmit sound? Using an interactive, scholars examine how songs travel through the air. The resource explains the process from the radio station, to signal towers, to the radio unit. A look at...

In this illustrated tutorial, find out how radio signals get transmitted from an antennae to the air.

What do the radio, TV, radio controlled cars, and cell phones all have in common? They all use invisible waves to transmit information. Find out which materials block radio waves, and which materials allow radio waves to pass through in...

Fifth graders examine electromagnetic wave spectrum. In this science lesson, 5th graders discuss the aspects of the electromagnetic wave spectrum and complete a worksheet identifying the parts of the spectrum.

See how radio control in a remote control system works. [0:24]