Presentation on theme: "Believe it or Not! Gondwanaland was the southern supercontinent formed after Pangaea broke up during the Jurassic period. It included what are now the."— Presentation transcript:
Believe it or Not! Gondwanaland was the southern supercontinent formed after Pangaea broke up during the Jurassic period. It included what are now the continents South America, Africa, India, Australia, and Antarctica. ry/Pangaea.shtmlhttp://www.enchantedlearning.com/subjects/dinosaurs/glossa ry/Pangaea.shtml
Daily Oral Language The Earth's crust is divided into hug, thick plates that drift atop the soft mantle? The plats is made of rock and are from 80 to 400 miles thick. They move both horizontally and vertical. Over long periods of time, the plates also change in size as their Margins are added to, crushed together, or pushed back into the earth's Mantle.
Daily Computation In 1915, the German geologist and meteorologist Alfred Wegener first proposed the theory of continental drift, which states that parts of the Earth's crust slowly drift atop a liquid core. The fossil record supports and gives credence to the theories of continental drift and plate tectonics. How many years ago was this first theory proposed?