40% Geology
- rocks, minerals, and the rock cycle
- paleontology (history of Earth, fossils, geologic time)
- ecology (natural resources, conservation)
- plate tectonics (layers of Earth, continental drift, etc.)
- Volcanoes and Earthquakes (plate boundaries, faults, stress, etc.)
- Weathering, erosion, deposition, and soil
40% Hydrology & Meteorology
Hydrology:
- Ocean water chemistry
- Water distribution
- Ocean zones (the water column)
- waves, currents, and tides
- atmosphere
- weather tools
- weather factors (temperature, humidity, etc.)
- weather patterns (air masses & fronts)
20% Astronomy
- Big Bang
- History of the universe
- Astronomers and their theories
- Planets
- Moon phases
- eclipses
- day/night - rotation/revolution
- seasons