This textbook chapter looks at the role of temperature in sustaining life on Earth and on weather and climate. It discusses the Earth's movements and the seasons, the circulation of the oceans, wind and weather, and the water cycle....

Is it time for high tide? Make studying the tides fun with this video. Understand the impact of gravity on the water surfaces of the earth. Take the test to see how well the information is understood.

Find real-time daily precipitation analysis for the United States, Mexico, and South America as well as accumulated precipitation maps for the past 30 or 90 days.

Students investigate the effects of salinity on the formation of sea ice, and whether salt water freezes more quickly or more slowly than fresh water.

Young students are introduced to the complex systems of the Earth through numerous lessons on its natural resources, processes, weather, climate and landforms. Key earth science topics include rocks, soils and minerals, water and natural...

Use this site to explore real scientific data relating to the hydrosphere. With this information you can gather evidence, test theories, and come to conclusions. Click on the data examples to view a full scale version.

This site from USGS provides several activities to help understand the interrelationships among earth surface processes, ecological systems, and human activities. Also included are links to new findings and programs concerning Earth...

Lena Pillars Nature Park is marked by spectacular rock pillars that reach a height of approximately 100 m along the banks of the Lena River in the central part of the Sakha Republic (Yakutia). They were produced by the region’s extreme...

"South China comprises the drainage basins of the middle and lower Yangtze River, the basin of the His Chiang (West River) in Kwangtung and Kwangsi; and the mountainous coastal provinces of Fukien and Chekiang. The division between the...