CK-12 Foundation
Light Wave
Do radio waves create light? It's more difficult to understand the things we can't see than those that we can. The simulation compares the relatively small range of visible light to the entire electromagnetic spectrum. It graphs the size...
Curated OER
AC Waveforms
In this AC waveforms instructional activity, learners answer ten questions about AC voltage, frequencies of waveforms and they interpret diagrams of AC voltage.
CK-12 Foundation
Black Hole
What happens to radio waves, time, and light in and near a black hole? Young scientists explore what is known about observing frequency and time at various distances from a black hole. They control the size of the black hole and the...
Curated OER
Explorit's Physics Quiz (Level 1)
In this online interactive physics quiz learning exercise, students respond to 5 questions. Students may check their answers for accuracy.
Curated OER
Sources of Electricity
In this online electricity worksheet, students are asked 10 questions about electric current and battery energy, an online answer key provided.