Intermediate Intermediate difficulty. Oceans Which North Pacific current flows northeastward past Japan? Answer Kuroshio Current Draw the answer
Easy Easy difficulty. Oceans What is the largest island located in the Indian Ocean? Answer Madagascar Draw the answer
Hard Hard difficulty. Oceans What treaty banned nuclear weapon tests in the atmosphere, outer space, and underwater in 1963? Answer Partial Test Ban Treaty Draw the answer
Hard Hard difficulty. Oceans What 1960 expedition made the first crewed descent to the Challenger Deep? Answer Project Nekton Draw the answer
Intermediate Intermediate difficulty. Oceans Which instrument measures ocean depth by sending sound pulses to the seafloor? Answer Echo sounder Draw the answer
Intermediate Intermediate difficulty. Oceans What term describes the open ocean water column away from the coast and sea floor? Answer Pelagic zone Draw the answer
Intermediate Intermediate difficulty. Oceans What is the ocean zone between about 200 and 1,000 meters deep, also called the twilight zone? Answer Mesopelagic zone Draw the answer