Thomas Jefferson National Accelerator Facility
Jefferson Lab: Reading Comprehension Passages
Thirty-three cloze reading passages on various scientific passages including the scientific method, the water cycle, earth science, atoms, elements, cell division, body systems, and more.
Smithsonian Institution
Smithsonian Environmental Research Center: Forces of Change:meet Your Atmosphere
This superb site has detailed information about the composition of the atmosphere, how it is always changing, how it protects life on earth, and the destructive impact human activity has on it. There is an atmosphere design lab, as well...
Other
The Greenhouse Effect: Natural and Amplified Warming
This concise resource presents a thorough drawing which simplifies the explanation of the greenhouse effect into six easy to understand steps.