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Chapter 1 Study Guide – Introduction To Earth Science 1. For a scientific theory to be valid, it must a. be well tested. c. explain observable natural events. b. be widely accepted. d. all of the above 2. Earth's crust, mantle, and core make up the a. geosphere. c. atmosphere. b. biosphere. d. lithosphere. 3. A group of interacting parts that form a complex whole is a. a theory. c. a hypothesis. b. a system. d. the plate tectonic theory. 4. The sun's energy drives which of the following processes or events? a. volcanic eruptions c. earthquakes b. hurricanes d. mountain building 5. Which of Earth’s spheres includes the oceans, groundwater, and lakes? a. atmosphere c. hydrosphere b. biosphere d. geosphere 6. The asthenosphere and lithosphere are parts of Earth’s a. geosphere. c. hydrosphere. b. biosphere. d. atmosphere. 7. What are the three main parts of the geosphere? a. atmosphere, crust, core c. crust, mantle, core b. lithosphere, mantle, core d. asthenosphere, lithosphere, atmosphere 8. The theory of plate tectonics helps scientists explain a. how ocean currents move over Earth’s surface. b. why hurricanes occur. c. how earthquakes and volcanic eruptions occur. d. why Earth’s mantle is more dense than its crust. 9. We can say that Earth is a system because all of its parts a. represent separate closed systems. b. interact. c. were formed at the same time. d. are powered by the same energy source. Chapter 1 Study Guide – Introduction To Earth Science 10. Which of the following are powered by energy from Earth’s interior? a. erosion c. volcanoes b. ocean circulation d. weather 11. A scientific hypothesis can become a theory if a. the entire scientific community accepts it. b. the hypothesis is tested extensively and competing hypotheses are eliminated. c. there are no other competing hypotheses. d. the hypothesis can be tested at least once. 12. Which of the following is NOT one of the main areas of Earth science? a. geology b. oceanography c. astrology d. astronomy 13. According to the nebular hypothesis, our solar system formed from a huge rotating cloud made mostly of a. carbon and hydrogen. b. helium and hydrogen. c. oxygen and helium. d. nitrogen and oxygen. 14. Which of the following would be one of the interacting parts in a weather system? a. weather satellite b. clouds c. tectonic plate d. GPS unit Completion Complete each statement on the line provided. Hypothesis system nebular Earth Geosphere asthenosphere Sun theory constructive subsystems 15. The ____________________ hypothesis suggests that our solar system evolved from a huge rotating cloud. Chapter 1 Study Guide – Introduction To Earth Science 16. Earth can be divided into four major spheres: the hydrosphere, the atmosphere, the __________________________, and the biosphere. 17. According to the theory of plate tectonics, _____________________ forces such as volcanism and mountain building receive energy from Earth’s interior. 18. Earth as a system is made up of many ___________________ that interact. 19. A(n) ________________ is a group of interacting parts that form a complex whole. 20. The Earth’s atmosphere and hydrosphere are powered by the ___________________________. 21. Only after a hypothesis has been tested extensively can it become a scientific __________________. 22. A group of sciences called ______________________ science deals with Earth and its neighbors in space. 23. Earth’s lower mantle lies below the _______________________ . 24. The idea that Earth was the center of the universe is an example of a(n) ___________________that has long been discarded. Essay In complete sentences, write the answer to the question on the lines provided. 25. Earth as a System. Discuss how human activities can affect natural processes such as landslides and floods.