Slide 1 EARTHQUAKES & VOLCANOES REVIEW Which seismic waves are the fastest? P waves Which seismic waves are the first to be recorded? P waves Which seismic waves are…

C4S4 C4S4 Sea-Floor Spreading Mid Ocean Ridges Mid-Ocean Ridge Is an undersea mountain chain that is part of a long system of mountains that winds beneath Earthâs oceans.…

Section 4: Sea-Floor Spreading What is the process of sea-floor spreading? What is the evidence for sea-floor spreading? What happens at deep-ocean trenches? Mid-Ocean Ridges…

C4S4 C4S4 Sea-Floor Spreading Mid Ocean Ridges Mid-Ocean Ridge Is an undersea mountain chain that is part of a long system of mountains that winds beneath Earthâs oceans.…

Who is Harry Hess? Harry Hess was a geologist and Navy submarine commander during World War II. Part of his mission had been to study the deepest parts of the ocean floor.…