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COLLIDING CONTINENTS 1. Which is not one of the 7 2. 3. 4. 5. 6. continents? a. Asia b. Australia c. Africa d. USA Why is granite less dense than other rock in Earth’s mantle? a. It is made of lighter metals. b. It is made of heavier metals. Most scientists believe that the water that formed our oceans came from what? a. Stars b. Meteors c. The moon d. The sun What continent is believed to be the site of the earliest giant continental landmass on Earth? a. Asia b. Africa c. Australia d. New Zealand What type of rock formed the first continents? a. Zircon b. Granite c. Diamond d. Uranium As radioactive uranium decays it turns into what stable element? a. Granite b. Poison cookies c. Lead d. Zircon 7. How old was Earth believed to be when the first early, relatively stable landmasses formed? a. 105 million b. 1 million c. 15 million d. 150 million 8. 6 billion years ago, the Earth is created from what? a. The debris left over from the formation of Pluto. b. The debris left over from the formation of the moon. c. The debris left over from the formation of the sun. d. The debris left over from the formation of One Direction. 9. The ‘giant jigsaw puzzle’ of interlocking pieces that make up Earth’s crust are called what? a. Subduction zones b. Pangaea c. China d. Tectonic plates 10. Evidence for the theory of continental drift was proposed in 1912 by what German Scientist? a. Alfred Wegener b. Albert Einstein c. Alfred Vagen d. Albert Wegener 11. When Wegener first proposed his theory of continental drift, why were his ideas rejected? a. The idea that the continents moved was considered preposterous. b. His ideas were not rejected. They were accepted. COLLIDING CONTINENTS 12. Heat escaping from the _____ 13. 14. 15. 16. 17. creates convection currents in the next layer of the Earth, the ______. a. Core/mantle b. Mantle/core How many tectonic plates can be identified on Earth today? a. 12 b. 11 c. 10 d. 9 The world’s last super continent is known as a. Gondwana b. Pangaea c. Rodinia d. Pannotis During the break-up of Pangaea, South America split off from ? a. Australia b. Asia c. Africa d. South America During the break-up of Pangaea, North America split off from ? a. Asia b. Europe c. Africa d. South America During the break-up of Pangaea, Australia split off from ? a. Antarctica b. Asia c. Europe d. South America 18. As plates move across the Earth, crust and rock is dragged back down into what zones? a. Production zones b. Induction zones c. Subtraction zones d. Subduction zones 19. The formation of the Alps is the direct result of collision between what two continents? a. Africa and Europe b. Asia and Europe c. Africa and Asia d. Africa and Australia