Earth geological and climatic history
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?

Subtopics

  1. Plate tectonics Plate tectonics
  2. Seismic waves and how we know Earth's structure Seismic waves and how we know Earth's structure
  3. Earth's rotation and tilt Earth's rotation and tilt