This Thermal Energy unit has students investigating two ways to transfer energy into a drink: (1) the absorption of light and (2) thermal energy from the warmer air around the drink. They are then challenged to design their own drink...

A video and a short quiz on the properties of light.

Students are able to explore the effects of energy on excitation of atoms through simulations, then relate this information to photons at atoms' absorption and emission of light. Multiple-choice and short answer questions are found...

Did you know that light is a form of energy and always travels in a straight line? Discover some more interesting facts about light.

[Free Registration/Login Required] Neon lights are a type of discharge tube. Observe how electrons create colored light in a hydrogen gas discharge tube. Can you figure out why hydrogen's emission spectrum contains more than one color of...

This site details what radiation is, the physics of radiation, and radiative transfer as it occurs in nature. Content explores the electromagnetic spectrum, electromagnetic waves, properties of radiation, and solar radiation.

In this encyclopedia entry, you will find concise text explaining photosynthesis supplemented by a very detailed diagram of the process.