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Name ______________________________ Class ___________________ Date __________________ Skills Worksheet Directed Reading B (Lesson 4-4) Section: Metamorphic Rock ORIGINS OF METAMORPHIC ROCK Circle the letter of the best answer for each question. 1. What process is a rock undergoing when the new environment is different from the one in which the rock was formed? a. stratification b. melting c. metamorphism d. deposition 2. What aligns in parallel bands due to added pressure on a rock during metamorphism? a. mineral grains b. sandstone c. magma d. fissures Contact Metamorphism 3. What occurs when a rock undergoes metamorphism by being heated by nearby magma? a. erosion b. deposition c. regional metamorphism d. contact metamorphism 4. The effect of contact metamorphism is greatest when the rock comes in direct contact with what? a. water b. magma c. sediment d. soil Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 24 Rocks: Mineral Mixtures Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Regional Metamorphism Circle the letter of the best answer for each question. 5. What deforms and chemically changes rocks by means of increases in pressure and temperature? a. erosion b. contact metamorphism c. regional metamorphism d. deposition 6. What kind of metamorphism occurs over large areas deep in the Earth’s crust? a. regional metamorphism b. erosion c. contact metamorphism d. deposition COMPOSITION OF METAMORPHIC ROCK Read the words in the box. Read the sentences. Fill in each blank with the word or phrase that best completes the sentence. stable index minerals pressure 7. Metamorphism occurs when temperature and ______________________ inside the Earth’s crust change. 8. During metamorphism, the original minerals change into minerals that are more ______________________ in the new conditions. 9. The presence of ______________________ indicates the temperature, pressure, and depth of rocks that undergo metamorphism. Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 25 Rocks: Mineral Mixtures Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued TEXTURES OF METAMORPHIC ROCK Foliated Metamorphic Rock Read the description. Then, draw a line from the dot next to each description to the matching word. 10. the property of having mineral grains that are arranged in bands 11. what shale becomes under pressure 12. rock formed when slate is exposed to more heat and pressure 13. rock formed when schist is exposed to more heat and pressure • • • • a. slate b. gneiss c. foliated d. phyllite Nonfoliated Metamorphic Rock 14. What do we call metamorphic rocks in which mineral grains are not arranged in bands? a. slate b. foliated c. nonfoliated d. gneiss 15. What do we call the process in which crystals change in size or composition? a. foliation b. recrystallization c. sedimentation d. deformation Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 26 Rocks: Mineral Mixtures Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Circle the letter of the best answer for each question. 16. What forms when quartz sandstone is exposed to heat and pressure? a. phyllite b. gneiss c. shale d. quartzite METAMORPHIC ROCK STRUCTURES 17. What is the term that describes the change in the shape of rock caused by squeezing or stretching? a. cementation b. metamorphism c. recrystallization d. deformation 18. What do folds and bends in rocks show? a. They have been weathered. b. They have been deformed. c. They have been eroded. d. They have been melted. Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 27 Rocks: Mineral Mixtures