NASA
Nasa Wavelength: Matter Cycles Matter: The Case of Carbon
A collection of teaching resources that look at the carbon cycle and its role in a changing climate.
BBC
Bbc Schools: Ks2 Bitesize: Science: Materials: Changing States
Investigate the changing states of water as you help Steve stay alive while in the Arctic. Includes background information about changing states of matter and about the water cycle, as well as a quiz.
University Corporation for Atmospheric Research
Ucar: Atmospheric Science Explorers: Global Climate Change
A detailed overview of global climate change, with explanations of Earth's climate change, the carbon cycle, ecosystems, and greenhouse gases, and how the movements of matter and energy impact on climate. All information is reinforced...