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Earth Revealed
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21.

Groundwater [electronic resource]

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Reminds us that approximately three-quarters of Earth's surface is covered by water but most fresh water comes from underground. Topics include aquifers, rock porosity and permeability, artesian wells, the water table, cave formation, sinkholes, and how groundwater may become contaminated.
Online
1992
22.

Wind, Dust and Deserts [electronic resource]

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Demonstrates that land in arid climates is shaped in particular ways. Shows how deserts are defined by infrequent precipitation and how desertification relates to proximity to the equator, proximity to mountains, and ultimately plate tectonics. Images of landscapes illustrate how wind creates features such as dunes, playas, blow-outs, and even oases
Online
1992
23.

Glaciers [electronic resource]

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Demonstrates that many of the world's most beautiful landscapes were made by glaciers. Explains glacial formation, structure, movement, and methods of gouging and accumulating earth. Provides images of glaciers and glacial landforms such as moraines, and discusses how study of glaciers may help us understand ice ages and the greenhouse effect.
Online
1992
24.

Waves, Beaches and Coasts [electronic resource]

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Shows the dynamic interaction of two geologic agents: rocky landmasses and the energy of the ocean. Aspects of waves and their types, parts, movement, and impact on the shore are illustrated. Also covers shoreline characteristics, currents, sea barriers, tides, and how the greenhouse effect could impact sea level and coastal lands.
Online
1992
25.

Living With Earth: 1 [electronic resource]

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Scenes of San Francisco before the Loma Prieta earthquake address how humans are learning to cope with earthquakes. Various groups and agencies are studying the San Andreas Fault and the damage caused along its path to better understand how earthquakes ravage the land. Methods of studying earthquakes are reviewed.
Online
1992
26.

Living With Earth: 2 [electronic resource]

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Discusses where oil comes from, how it is extracted, and how it is converted into energy. The effects of oil drilling and the burning of fossil fuels are also addressed, and the potential of alternative energy sources is considered
Online
1992
27.

Geologic Time

Develop a sense of the vast amounts of time over which geologic processes have been at work. Learn that the calibration of geologic time is attributed to relative age dating and absolute age dating.
Online
2015; 1999
28.

Sedimentary Rocks

Sedimentary rocks are made of fragments of other rocks, and they are an open book to the fascinating history of the physical earth and the changes it has undergone. Watch as this video explores the formation and classification of sedimentary rocks.
Online
2015; 1999
29.

Weathering

Watch this program to gain perspective on how minerals and rocks change when subjected to the physical and chemical conditions that exist at Earth's surface through the subtle geologic process of weathering.
Online
2015; 1999
30.

Living Through an Earthquake

This video focuses on what was learned by geologists following the earthquake along the San Andreas fault line in 1989 that devastated Loma Prieta and San Francisco. Evaluate suggestions that geologists give for earthquake preparedness.
Online
2015; 1999
31.

Mountain Building and Continents

Consider how major mountain belts and continents have evolved. By mapping, measuring, and sampling rocks of regions, geologists discovered how mountains and continents were formed in this worldwide geologic puzzle that is the history of the earth.
Online
2015; 1999
32.

Waves, Beaches and Coasts

Explore the importance of waves in the development of coastal landforms. Take a closer look at how human activity has been impacting coastlines and sea levels.
Online
2015; 1999
33.

Ground Water

Water is vital to civilization but its supply is limited. Investigate groundwater sources that provide water suitable for drinking and irrigation, and consider steps that are being taken to protect the quality of groundwater.
Online
2015; 1999
34.

Deserts

Watch this exploration of deserts and their geologic features. The desert is a harsh environment with very little rainfall and extreme temperatures that are transformed by climate change.
Online
2015; 1999
35.

Glaciers

This video focuses on the properties of glaciers and assesses their importance in forming Earth's topography. Note that the amount of ice on the Earth's surface has varied greatly through time as part of the natural geologic cycle.
Online
2015; 1999
36.

Earthquakes

Earthquakes have fascinated and frightened humans for thousands of years. Watch as this video investigates the nature and consequences of earthquakes.
Online
2015; 1999
37.

Earth's Limited Resources

This program provides an overview of energy resources. Consider how the depletion of nonrenewable resources has led geologists to search, in fascinating ways, for stores of fossil fuels within the earth and renewable energy resources that can be accessed.
Online
2015; 1999
38.

The Sea Floor

Marine geologists utilize many types of remote research tools to learn about the sea floor and its features. Take note of major sea-floor features: the mid-oceanic range, oceanic trenches, and fracture zones.
Online
2015; 1999
39.

Volcanism

Assess the importance of volcanic activity to Earth's geology and climate. Find out how geologists monitor volcanoes and research data in order to protect future generations from the destruction that volcanoes can cause.
Online
2015; 1999
40.

Mass Wasting

Mass wasting is defined as the down slope movement of rock and mud near the earth's surface mainly due to the force of gravity. Consider how this natural process affects property and people.
Online
2015; 1999