NASA
Nasa: Ocean Motion: Wind Driven Surface Currents: Upwelling and Downwelling
Explains what upwelling and downwelling of ocean currents are, and the impact of Ekman transport and the Coriolis effect on current movement as well as where they occur. The effects of upwelling and downwelling on water temperature and...
NASA
Nasa: Robin Whirlybird on Her Rotorcraft Adventures
Read (or listen to) the illustrated story of Robin, who goes to work with her mother who works at a rotorcraft research center. Includes many interactive supplemental activities.