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Name ______________________________ Class ___________________ Date __________________ Skills Worksheet Directed Reading B Section: Inside the Earth Circle the letter of the best answer for each question. 1. What is the Earth made of? a. several layers b. hollow space c. solid rock d. one layer THE COMPOSITION OF THE EARTH Read the description. Then, draw a line from the dot next to each description to the matching word. 2. substance made of two or more elements 3. thinner, outer layer of Earth 4. layer between the crust and core 5. layer made of the heaviest elements PHYSICAL STRUCTURE OF THE EARTH 6. number of Earth’s physical layers 7. layer of the Earth made of crust and upper mantle 8. part of the mantle made of solid rock that flows slowly • • • • • • • a. compound b. core c. crust d. mantle a. lithosphere b. asthenosphere c. five Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Read the description. Then, draw a line from the dot next to each description to the matching word. 9. strong, lower part of the mantle 10. liquid layer under the mantle 11. solid center of Earth • • • a. outer core b. mesosphere c. inner core TECTONIC PLATES Circle the letter of the best answer for the question. 12. What are large pieces of lithosphere that move on top of the asthenosphere called? a. mantle pieces b. crust plates c. tectonic plates d. puzzle pieces A Giant Jigsaw Puzzle 13. How do tectonic plates fit together? a. like a layer cake b. like a jigsaw puzzle c. like a stack of books d. like a model car A Tectonic Plate Close-Up 14. Which of the following is the thickest part of the South American plate? a. the continental crust b. the oceanic crust c. the mantle d. the mid-Atlantic Ocean Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Like Ice Cubes in a Bowl of Punch Circle the letter of the best answer for the question. 15. How are tectonic plates like ice cubes in a bowl of punch? a. Tectonic plates move and touch each other. b. Tectonic plates melt and become liquid. c. Tectonic plates sink and disappear from the surface. d. Tectonic plates freeze and become harder. MAPPING THE EARTH’S INTERIOR 16. What causes seismic waves? a. winds b. an earthquake c. magnetic reversal d. rain 17. What can scientists find out about the Earth with a seismograph? a. Earth’s density and thickness b. Earth’s age c. Earth’s atmosphere d. Earth’s temperature 18. Why are tectonic plates like the pieces of a jigsaw puzzle? _______________________________________________________________ _______________________________________________________________ 19. What are the two kinds of crust that a tectonic plate may contain? _______________________________________________________________ _______________________________________________________________ Name ______________________________ Class ___________________ Date __________________ Directed Reading A continued 20. List three ways in which tectonic plates floating on the asthenosphere are similar to ice cubes filling a punch bowl. _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ MAPPING THE EARTH’S INTERIOR _____ 21. What do scientists use to study Earth’s interior? a. sea-floor spreading rates b. magnetic reversals c. global positioning system d. seismic waves _____ 22. What are seismic waves? a. movements in the outer core b. pictures of the Earth’s interior c. vibrations from an earthquake d. vibrations from a seismograph 23. Will a seismic wave traveling through a solid go faster or slower than a seismic wave traveling through liquid? Explain your answer. _______________________________________________________________ _______________________________________________________________ _______________________________________________________________