What is light energy? Here we'll learn about the properties of light and how pigments such as chlorophylls absorb light energy.

Article explores the light-dependent reactions as they take place during photosynthesis in plants. Traces how light energy is used to make ATP and NADPH and explains photosystems and electron transport chains.

Produce light by bombarding atoms with electrons. See how the characteristic spectra of different elements are produced, and configure your own element's energy states to produce light of different colors.

The report provides an overview of the electricity consumption in households in 2001. End-use (lighting, appliances, heating) data is presented in written, graph and table form. Background on efficiency standards and regional factors...

Discussion of the conversion of light energy to chemical energy through the life-sustaining process of photosynthesis. Explores the reactions of photosynthesis, where they take place, and their ecological importance.

Physics students find out how to effectively define and clarify kinetic and potential energy.

Read this illustrated article to help you understand the concept of work in regards to the transfer of mechanical energy.

Students learn how laser communication systems are built by observing how sound can be encoded into, and transmitted by a light beam.

Background information on the history of photosynthesis. An explanation for how light is used to assist in making food for plants as the transfer of electrons allows energy to flow through the system.

In this lesson plan, students will research energy conservation devices and build a demonstration project incorporating a device.

A very simple electrical resistance thermometer is described that can be built, calibrated and tested in a school laboratory at virtually no cost. With it, flames, focused sunlight and other high temperature sources can be probed. The...

Demonstrates how principles of kinetic energy, potential energy and energy conservation can be used to determine the speed of a descending object if given its initial height. Further discussion of other topics such as heat and...

This site from Architectural Acoustics and Lighting provides a discussion of various factors affecting the acoustics of a given room. Room dimensions, the wavelength of the sound wave, the physical characteristics of the walls, the...

Students work in teams to learn about solar panel design, simple circuits, and how solar energy is used to provide power to simple machines such as calculators.

Conserve energy at home with Compact Fluorescent Lamps or CFL light bulbs.

Students learn a simple technique for quantifying the amount of photosynthesis that occurs in a given period of time, using a common water plant (Elodea). They can use this technique to compare the amounts of photosynthesis that occur...

A teaching guide with eleven lessons on the atmosphere, and the impact that different kinds of energy have on the atmosphere and ecological systems. The unit and accompanying PowerPoint can both be downloaded.

An environmentally conscious group brings to light the relationship between food, water and energy, and the importance of sustainability. The site looks at issues such as animal welfare, social justices, food policy, the industrial food...

Although it is arguably the most successful theory in physics, quantum physics has often baffled and confounded both its practitioners and the general public. This informative website discusses the types of mysteries, which still plague...

Students learn about the conservation of energy, aspects that affect energy in a system such as pressure and temperature, and to gain a better understanding of concepts such as entropy.

Deep under the ocean there is no light for plants to perform photosynthesis. This site is a good overview of the alternative energy method, chemosynthesis. Read all about it.

Most of us have seen the rainbow-hued breakdown of the composition of light. Light is of course a form of energy. A magnetic field changes the behavior of light- a phenomenon known as the Zeeman effect.

During this lesson, students will construct a passive solar house from everyday items then explore how the sun's energy is used to heat and cool it.

The invention of the telescope helped change our understanding of the universe. This video segment adapted from NOVA looks at Galileo's contribution to this technology. [1:49]