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Earth geological and climatic history

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Plate tectonics: Difference between crust and lithosphereStructure of the earthPlate tectonics: Evidence of plate movementPlate tectonics: Geological features of divergent plate boundariesPlate tectonics: Geological features of convergent plate boundariesPlates moving due to convection in mantleHawaiian islands formationPangaeaCompositional and mechanical layers of the earthHow we know about the earth's core
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Seismic wavesWhy S-waves only travel in solidsRefraction of seismic wavesThe mohorovicic seismic discontinuity
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Seasons aren't dictated by closeness to sunSeason simulatorHow Earth's tilt causes seasonsAre southern hemisphere seasons more severe?Milankovitch cycles precession and obliquityPrecession causing perihelion to happen laterWhat causes precession and other orbital changesApsidal precession (perihelion precession) and Milankovitch cycles
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Intro to Moon phasesSolar and lunar eclipsesSolar eclipse 2017

About this unit

What is the Earth made up of and how do we know? What causes the seasons? Are there longer-ranging cycles in Earth's climate?