Ice Core Gateway: Vostok Ice Core CO2 Data The Vostok ice core
has a long record of global carbon dioxide concentrations, with
variations caused by factors other than photosynthesis and human
activity. Ice core data sets from three different authors are
available for download. Users can also link to other NOAA
paleoclimate projects and information. Phases of the Moon This
site contains a series of visualizations of the sun, moon and
Earth System and how they relate to the changing face of the
moon. Animations are in the form of Java applets, forms for
field observation of the moon, and a collection of exercises and
PDF versions of background material. There are practice
questions and quizzes that discuss the animations. Planetary
Climate Exercise This MS Word document explains roles for a
Planetary Climate role-playing exercise dealing with the
atmospheres of Venus and the Earth. Roles include experts on
coal, carbon dioxide, heat balance, spectroscopy, atmospheric
transmission and the water cycle. Starting O