1. Modern Ocean Exploration 20 th century

2. Modern Exploration England 1760  time to spreadEngland 1760  time to spread Most noticeable effects appear late 1800sMost noticeable effects appear late 1800s Science/Technology pace of advancement similar to todayScience/Technology pace of advancement similar to today Steam engines, iron shipsSteam engines, iron ships Industrial Revolution 1900

3. Underwater shipsUnderwater ships –Diesel engine, Electric motors, Lead- acid battery Germans sinking Lusitania (used submarine) key factor in USA entering WWIGermans sinking Lusitania (used submarine) key factor in USA entering WWI Cold War – USA/Soviet Union explore sea and spaceCold War – USA/Soviet Union explore sea and space 1900 1915 1960s and 70s

4. Main Expeditions German 1925 – 1927 – Atlantic (14 times!)German 1925 – 1927 – Atlantic (14 times!) mapping Atlantic seafloor with echo- sounding technology – led to new theories as seafloor was not flat! mapping Atlantic seafloor with echo- sounding technology – led to new theories as seafloor was not flat! US 1931 – AtlanticUS 1931 – Atlantic 1 st ship specifically designed/built for ocean studies1 st ship specifically designed/built for ocean studies Built upon Meteor’s data  Mid-Atlantic Ridge and mapped itBuilt upon Meteor’s data  Mid-Atlantic Ridge and mapped it Meteor Expedition Atlantis

5. 1951 – 1953: Atlantic, Pacific and Indian1951 – 1953: Atlantic, Pacific and Indian Depths using echo-sounding technologyDepths using echo-sounding technology Built upon Atlantis’ dataBuilt upon Atlantis’ data Deepest known part of Ocean  Challenger Deep in Marians Trench at 10, 838 m (35, 558 ft)Deepest known part of Ocean  Challenger Deep in Marians Trench at 10, 838 m (35, 558 ft) H.M.S Challenger II

6. Now, add to your notes On L column, by date/main topicOn L column, by date/main topic A little picture/sketch that will help you remember the eventA little picture/sketch that will help you remember the event