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Task to i) Explain how continental drift works to move tectonic plates over time. ii) Explain 3 pieces of Wegener’s evidence for continental drift. iii) Explain new evidence of continental drift Key Words: Tectonic plates fossils evidence Continental drift peer review volcanoes Pangaea Earthquakes 1. In the 1800’s how did geologists explain how mountains had formed? _______________ __________________________________________________________________ __________________________________________________________________ 2. Name the meteorologist who came up with the theory of continental drift. __________ 3. Which 3 pieces of evidence did he give for his theory. 4. Why didn’t other scientists believe him? ___________________________________ __________________________________________________________________ Sketch a Diagram of Sea Floor spreading. Explain how sea floor spreading happens:_________________ _______________________ _______________________ _______________________ _______________________ _______________________ _______________________ _______________________ Plate techtonics Your Tas:. Draw a picture to explain the bullet points of plate techtonics. The earth’s structure is the solid crust on the surface, the semi solid mantle beneth it, the liquid outer core and the solid inner core. Ocean floor is created when two tectonic plates are moving apart, because hot molten rock rises and creates a ridge. This is called seafloor spreading. It is made up of dozens of giant slabs of rock called tectonic plates The lower mantle is hot and soft. It can flow slowly. Convection Currents in the mantle carry the plates along. Ocean floor is destroyed when one plate moves beneath another (called subduction). This can cause volcanoes to be created. When tectonic plates collide it can make fold mountains. When tectonic plates slide past each other it can cause earthquakes.