This activity introduces the role of diffusion in supplying cells with nutrients and removing wastes.
Movement of ions in and out of cells is crucial to maintaining homeostasis within the body and ensuring that biological functions run properly. The natural movement of molecules due to…
In this activity, you will use a computer model to investigate the earthquakes and volcanic eruptions that have occurred around the world since 1960.
Explore how electric current works. Start at an atomic level and use interactive models to investigate how temperature can affect conductivity and resistivity in a substance by monitoring a virtual…
How does electrical energy get from one place to another? In this unit, you will explore how electricity is moved around and transformed into other forms of energy.
What is electricity? Electricity is a part of modern life. Almost everyone has electricity in their house and uses it in dozens of ways all day long. But most people…
The interactions of electrons with matter have great explanatory power and are central to many technologies from transistors, diodes, smoke detectors, and dosemeters to sophisticated imaging, lasers, and quantum computing….
Use a series of interactive models and games to explore electrostatics. Learn about the effects positive and negative charges have on one another, and investigate these effects further through games….
In this activity, you will build an “air conditioner” that just uses water and a fan….
Investigate how atoms can be excited to give off radiation (photons) with models of electron energy diagrams. Explore the effects of energy levels in atoms through interactive computer models. Learn…