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Earth Science: CST Review , Day #4, CST Released Questions #28-42 1. Which of the following provides evidence for plate tectonics? ______________________________________ 2. The youngest rocks on the ocean floor are typically located near what feature? _________________ 3. A rift valley is evidence of which kind of plate boundary? ___________________ 4. The convergence of two continental plates would produce_________________________ 5. What is most responsible for the formation of new crust at the edge of a tectonic plate? Magma rising up from the ________________ at a _______________ boundary 6. It is generally true that igneous rocks are composed of ______________ minerals. 7. Relative cooling rates of igneous intrusive rocks can be estimated by comparing rocks’ _________________? 8. Which of the following is most likely to produce a fragmental sedimentary rock? __________ deposited in a silt _______________ 9. The San Andreas fault in California is an important example of which plate boundary? _________ boundary 10. Earthquake vibrations are detected, measured, and recorded by instruments called_____________________ 11. At which location would earthquakes be least likely to occur? ___ 12. At which location does SUBDUCTION occur?_____ 13. The Richter scale measures which earthquake characteristic? __________ 14. Which type of volcano is the least explosive? ______________ volcano 15. Which of the following energy sources is most likely to be abundant in California due to its position on a plate boundary? _______________ 16. What energy resource is made possible by the volcanic activity in California? ________________ Energy 17. Geothermal energy is possible where there is________________________. --------------------------------------------------------------------------------------------------------------------------------------QUESTIONS: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 . 11 . 12 . 13 . 14 . What is the process where the ocean floor is constantly forming new rock and expanding? Sea ______ spreading Where are youngest rocks of the ocean floor found near?______________________________________________ Which type of rock is made of silicate (crystal) material?___________________ The San Andreas fault in California is an important example of which plate boundary?______________________ How does the age of seafloor sediments change with increasing distance from the ocean ridge?_______________ __________________-- An opening in Earth’s crust through which molten rock, rock fragments, and hot gasses erupt. What is most magma made of? S _ _ i _ a __________________-- Magma that has reached the Earth’s surface. Where do most volcanoes form? Along _____________ plate b _ _ _ _ _ _ _ _ _ ________________-- What is the belt of volcanoes (and earthquakes) around the Pacific Ocean called? What are the three kinds of volcano shapes? 1. Shield, 2.C_____________, 3.C____________________ What energy resource occurs in volcanic areas where there is magma close to the Earth’s surface causing it to heat up groundwater in the area?_________________________________________ What is heat that is given off by magma close to the Earth’s surface is called?________________________ Why is geothermal energy is available in California? _________________ activity YMartinez 05/2010