Trees are the star of a three-step unit celebrating Arbor Day. Step one takes an in-depth look into the structure of a tree, the process of photosynthesis, and the benefits of the leafy giants. Step two challenges scholars to create a...

[Free Registration/Login may be required to access all resource tools.] How solar energy can be used and its consequences.

[Free Registration/Login may be required to access all resource tools.] How solar energy can be collected and used, and the consequences of it.

[Free Registration/Login may be required to access all resource tools.] Discusses the relationship between solar energy and latitude.

[Free Registration/Login may be required to access all resource tools.] Describes characteristics of solar energy including the electromagnetic spectrum and movement.

[Free Registration/Login may be required to access all resource tools.] A breakdown of the types of energy that Earth receives from the sun.

We've seen them for years on rooftops, atop highway warning signs, and elsewhere, but how many of us know how solar panels actually work? How do the photovoltaic cells that lie at the heart of them turn sunlight ("photo") into...

[Free Registration/Login may be required to access all resource tools.] What renewable energy resources are and examples of renewable energy resources.

[Free Registration/Login may be required to access all resource tools.] Compare and contrasts renewable and non-renewable resources.

[Free Registration/Login may be required to access all resource tools.] Discusses nonrenewable and renewable energy resources. Outlines world energy use and ways to conserve energy.

[Free Registration/Login may be required to access all resource tools.] How thermal energy is transferred by thermal radiation and sources of thermal radiation.

[Free Registration/Login may be required to access all resource tools.] Visible light and the different waves that make it up, infrared light and ultraviolet light.

[Free Registration/Login may be required to access all resource tools.] The Earth's magnetic field and how it protects life on Earth, and how it is used for navigation.

[Free Registration/Login may be required to access all resource tools.] Plant-like protists are known as algae. They are a large and diverse group. Plant-like protists are autotrophs. This means that they produce their own food. They...

[Free Registration/Login may be required to access all resource tools.] Describes how regional differences in solar radiation create global wind belts.

[Free Registration/Login may be required to access all resource tools.] Describes how regional differences in solar radiation create global wind belts.