Making the Pieces Fit: Seafloor Spreading
Wegener. The notion of seafloor spreading, which suggested that new seafloor develops at oceanic ridges--or "spreading centers"--eventually would provide a
Subject: ocean
Transcript: [atwater:] i really think our understanding of the oceans came Out because of world war ii, ironically, because, In world war ii, a lot of new
Making the Pieces Fit: Alfred Wegener and Continental Drift
Alfred Wegener proposed the idea of continental drift to explain the jigsaw puzzle fit of the continents. Wegner argued that the continents had all been joined together at one time as a super continent he called Pangaea. Wegener's ideas were initial...
Subject: ocean
First Steps: The History of Marine Exploration: Oceanographic Institutions
The world's first oceanographic laboratory was built not in the United States or Great Britain but in Italy. The two best known marine science institutions today, however, are the Scripps Institution of Oceanography, located in La Jolla, California,...
Subject: ocean
Transcript: that would really be a leader In the world of ocean sciences and ocean technologies. [narrator:] while scripps chose to align itself with an established
First Steps: The History of Marine Exploration: Technology and Collaboration
The past hundred years has been a time of explosive growth and change within marine science. Perhaps the greatest change has been the recognition that, if it is to flourish, oceanography must be practiced in a collaborative and multi-disciplinary ma...
Subject: ocean
Transcript: operated submersibles that probe the deep sea, and highly sophisticated satellites that can see virtually anywhere on the surface of the ocean. but perhaps
Making the Pieces Fit: Confirming the Theory of Plate Tectonics
The theory of plate tectonics was initially accepted largely on the basis of indirect, paleomagnetic data. Eventually, however, it was confirmed through the use of GPS technology, which is able to actually measure plate motion.
Subject: ocean
Making the Pieces Fit: Significance of Plate Tectonics Theory
The evidence of plate tectonics takes many forms, from mountain ranges to oceanic ridges and volcanism It is widely considered to be a unifying
Subject: ocean
Transcript: underneath another. If we go to the ocean basins, We see the massive mid-ocean ridge system-- Basically, a large 10,000-foot high mountain chain Which
Making the Pieces Fit: Coastlines and Jigsaw Puzzles
The scientific work that would eventually lead to the Theory of Plate Tectonics began with observations that the coastlines of Africa and South America are strikingly similar.
Subject: ocean
The Water Planet: Earth Without Water, An
From its likely role in the formation of life, to its impact on global climate, the world ocean has shaped planet Earth to an extent that is almost
Subject: ocean
Transcript: [narrator:] from its likely role in the formation of life, to its impact on global climate, the world ocean has shaped planet earth to an extent that
The Water Planet: Origin of Life on Earth
There is no definitive evidence that proves beyond a doubt where water originated. But wherever it came from, water did eventually cover more than two-thirds of Earth's surface. The implications of this for the formation of life on planet Earth were...
Subject: ocean
Transcript: might have been made in deep sea vents and fumaroles-- Wherever they were made, once they got into the oceans, The water protected them from being broken
Food for Thought: Conditions Required for Photosynthesis
The first step in the primary production process is photosynthesis. It can only take place if certain critical conditions are met, including the presence of light and chemical nutrients. Temperature also plays a role, with reactions proceeding more ...
Subject: ocean
Transcript: . And there's a lot of different things that affect light. Light's affected by how far-- how deep you go in the ocean, The euphotic zone being defined as