Roger Bragg
Career Profiles
Construction Electrician
Thundersnow: winter thunderstorms
STEM Explained
When thunder and lightning occur but the main form of precipitation is snow, not rain, it’s called thundersnow.
What are the Pros and Cons of Nuclear Energy?
STEM Explained
These two “point-counterpoint” videos provide arguments for and against using nuclear energy to generate electricity.
What If You Could Charge Your Phone Using Radio Waves?
STEM Explained
Could we use radio waves to charge electrical technologies in the future?
Thermopower and the Body Heat-Powered Flashlight
STEM Explained
Can your body be a source of electricity generation? Maybe, if you understand heat transfer. Explore this concept through a 2013 invention by a Canadian teen.
Understanding Electricity Supply and Demand
Backgrounders
Electricity demand changes constantly. Suppliers need to generate more electrical energy when demand is high, and less when demand is low.
Telegraph Key
Interactives
The telegraph works by transmitting signals through an electrical circuit. Learn more and print your own telegraph key using this 3d model of a real artefact.
Microbial Fuel Cells
STEM Explained
In a few decades, some of the electricity you use might be generated by bacteria.
How is Lenz's Law Used in Drop Tower Rides?
STEM Explained
How do magnetic fields help you get down safely from the top of a drop tower ride? Learn how electromagnetic induction works at the amusement park.
How can I move water with just a comb?
Hands-on Activities
Have you ever experienced static electricity? Like when you pull a wool sweater over your head in the winter? See what else static electricity can do in this hands-on activity.
Do Amps or Volts Kill You?
STEM Explained
This resource explains electricity basics - volts, amps, currents, resistance, and why it is dangerous to touch electrical outlets with wet hands.
Energy Efficiency at Home
STEM Explained
If you understand heat transfer, you can make lots of little changes at home to help the environment and your household’s bank account!
Can You Store Electricity for Later?
STEM Explained
Sometimes, power plants make too much electricity. Energy storage technologies can help! They store the extra electricity and release it when demand goes up.
Are wind farms a threat to wildlife?
STEM Explained
Wind power is a growing source of electricity generation. But wind projects often affect local wildlife populations, and researchers are using environmental monitoring techniques to alleviate some of these impacts.
How does a lithium-Ion battery work?
STEM Explained
Learn about the electrochemistry in the batteries that power many of the devices you use every day.