ENLS Digital Resources
Plate tectonics
Plate tectonics
Plate tectonics: Difference between crust and lithosphere
Structure of the earth
Plate tectonics: Evidence of plate movement
Plate tectonics: Geological features of divergent plate boundaries
Plates moving due to convection in mantle
Hawaiian islands formation
Pangaea
Compositional and mechanical layers of the earth
How we know about the earth's core
Seismic waves and how we know earth's structure
Seismic waves
Why S-waves only travel in solids
Refraction of seismic waves
The mohorovicic seismic discontinuity
Earth's rotation and tilt
Seasons aren't dictated by closeness to sun
How Earth's tilt causes seasons
Are southern hemisphere seasons more severe?
Milankovitch cycles precession and obliquity
Precession causing perihelion to happen later
What causes precession and other orbital changes
Apsidal precession (perihelion precession) and Milankovitch cycles
Moon phases and eclipses
The Moon
Solar and lunar eclipses