Each video lab consists of an 11 - 15 minute video plus a set of 3 or 4 related student lab activities and Teacher’s Guide.

SEA-FLOOR SPREADING
Video

Introduces a scientific revolution! Shows how the “Permanence” theory was replaced by sea-floor spreading to explain the origin of the ocean basins. Covers the roles of magnetic anomalies and paleomagnetism, sediment studies, and heat flow along the mid-ocean ridge in verifying the new theory.

Lab Activities

• Paleomagnetism
• Sediment Profile
• Heat Flow

Set: 10 booklets plus video....VLB-90  $99

Probes the origin and nature of seismic waves using spectacular scenes of earthquake effects. Examines P and S waves, epicenters, transcurrent and transform faults, with emphasis on the San Andreas Fault and subduction zone earthquakes. Relates seismic activity to plate tectonics. Extensive section of earthquake planning.

Lab Activities

• Earthquake Epicenters
• Earthquakes and Transform Faults
• Seismic Dynamics

Set: 10 booklets plus video....VLB-80  $99

A spectacular visual study of basaltic and andesitic volcanism. Eruption scenes of the Hawaiian volcanoes - with their massive flows of dark, viscous lava - are contrasted to the explosive nature of Mount St. Helens and its ash clouds derived from water-rich magma. Explains hot spots and subduction zone volcanism and their relationships to broader tectonic theory. Accurate and up-to-date.

Lab Activities

• Eruption and Ashfall

• Slope Comparison of Volcanoes

• Eruption Frequency and Prediction

• Eruption Effects/Land Use Planning

Set: 10 booklets plus video....VLB-70  $99