DVD (Chaptered)
DVD + 3-Year Streaming
3-Year Streaming
Geocycles (19:00)
Item# 34725

Planet Earth is an amazing machine, and we—and our future—are riding on it. This video introduces students to the Earth system’s primary interacting subsystems (the biosphere, geosphere, hydrosphere, and atmosphere); the nitrogen, carbon, and water cycles; and three surface processes: weathering, mass-wasting, and erosion. The greenhouse effect, the impact of acid rain on the environment, and diminishing freshwater resources around the world are considered as well. A viewable/printable instructor’s guide is available online. Correlates to National Science Education Standards, National Educational Technology Standards, and Standards for the English Language Arts. A Cambridge Educational Production. (19 minutes)

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Segments in this Video - (5)

1. Geosystems and Carbon Cycles (03:52)
 Available for Free Preview

Geosystems are Earth processes that move and recycle matter, keeping the planet in balance. Within Earth's system, the following subsystems work together: hydrosphere, lithosphere, biosphere, and atmosphere.

2. Earth's Hydrologic Cycle (02:50)

Earth's hydrologic cycle carries fresh water in all its forms through the earth and atmosphere through evaporation, condensation, precipitation. Ninety-seven percent of Earth's water is salt water and not readily available for human consumption.

3. Earth's Rock Cycle (02:13)

Rocks are recycled from molten magma to igneous and crystal rock. Once above ground, rocks are worn down into sediment and sedimentary rock. Through the process of metamorphism, rocks can become magma again.

4. Earth's Surface Changes (04:36)

Weathering (mechanical and chemical), mass wasting, and erosion are surface processes that break down rocks. Soil, a major product of weathering and one of Earth's most valuable resources, can be dramatically affected by climate.

5. Erosion and Glaciers (03:28)

Erosion, a slower process than mass wasting, can create unusual geological sights such as the Grand Canyon. Continental glaciers scour the surface beneath them down to bedrock while alpine glaciers create unusual topographical features such as the Matterh

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