Earth Science is closely related to physical geography.

Courtesy GIS Careers by ESRI

One of the most difficult aspects of learning online is knowing how and what to take notes on. If the course you are taking relies mostly on text to deliver its content, one does not have the audio and visual cues from a lecture to discern what is important to take note of. RNDEGREES.net provides has several good tips for note taking in an online course. These are:

  • Active Reading
  • Use Diagrams
  • Audio-visual materials
  • Note Taking Software
  • Reflecting on the Material
  • Referencing

See their site for details