Grade 7 Science Revision Sheet for third term final exam
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1 Grade 7 Science Revision Sheet for third term final exam Material for the final exam : 1- Chapter 4 sections [rock cycle + igneous rocks + sedimentary rocks + metamorphic rocks ] pages from the interactive Use the power point slides to revise lessons. 3- You can download the revision sheet from the website. list of measured standards: ES.4a ES. 4b a-students know Earth processes today are similar to those that occurred in the past and slow geologic processes have large cumulative effects over long periods of time. b-students know that the rock cycle includes the formation of new sediment and rocks and that rocks are often found in layers, with the oldest generally on the bottom. Name. Grade.7 Date. 1
2 Section : rock cycle Complete the following rock cycle : magma formed and started to cool sedimentary rock formed igneous rock formed more weathering and erosion metamorphic rock formed more heat and pressure factors Order the different factors which they lead to form the rocks : Section: Igneous Rock 2
3 1. What kind of rock forms when hot, liquid rock, or magma, cools and solidifies? a. sedimentary c. metamorphic b. igneous d. mineral 2. Which kind of rock has a name that comes from a Latin word that means fire? a. igneous c. metasedimentary b. metamorphic d. sedimentary ORIGINS OF IGNEOUS ROCK 1-Igneous rock begins as 2-What are the three ways that magma can form? 3-How does the composition of the magma affect the solidification temperature? IGNEOUS ROCK FORMATIONS Match the correct description with the correct term. Write the letter in the space provided. 1..a large, irregular-shaped intrusive body 2..the largest intrusive bodies 3..sheetlike intrusions that lie parallel to previous rock units a. pluton b. dikes c. batholiths d. sills 4..sheetlike intrusions that cut across previous rock units Complete the missing words : 3
4 1.Magma, or pushes, into surrounding rock below the Earth s surface to create such formations as batholiths and sills. 2. Intrusive igneous rock usually has a(n) texture 3.Igneous rock that forms from lava, or magma that erupts onto the Earth s surface, is called. 4. Lava can either erupt or flow from long cracks in the Earth s crust called. 5. When lava flows from fissures on the ocean floor at places where tension is causing the ocean floor to be pulled apart, new is formed. Section: Sedimentary Rock 1. Over time, grains of sand may be compacted and cemented together to form a rock called. ORIGINS OF SEDIMENTARY ROCK 2. When sediment is deposited in layers and compacted, is formed. 3. Dissolved minerals separate from water and become a natural that binds the sedimentary rock together. 4. Sedimentary rocks form at or near the Earth s 5. The most noticeable feature of sedimentary rock is often its layers, or COMPOSITION OF SEDIMENTARY ROCK 6. Rock or mineral fragments are called. 7. Sedimentary rock that forms when rock or mineral fragments are cemented 4
5 together is called sedimentary rock. 8. Sedimentary rock that forms when minerals crystallize out of solution, such as sea water, to become rock is called sedimentary rock. 9. Sedimentary rock that forms from the remains, or fossils, of plants and animals is called sedimentary rock. 10. Some limestone is made of the skeletons of tiny organisms called. 11. An organic sedimentary rock that forms from the action of heat and pressure on plant material over millions of years is called 12.Order the different process which led to form the sedimentary rocks : SEDIMENTARY ROCK STRUCTURES 13. What is the process in which sedimentary rocks are arranged in layers? a. mud cracking b. weathering c. stratification d. erosion 14. What are the markings on sedimentary rocks that record the wave motion of wind or water called? a. ripple marks b. stratification c. fossiliferous limestone d. mud cracks 15. What do we call the structures that form when fine-grained 5
6 sediments at the bottom of a shallow body of water are exposed to the air and dry out? a. ripple marks b. fossiliferous limestone c. coal d. mud cracks ORIGINS OF METAMORPHIC ROCK 1. The heat and pressure at which some metamorphic rocks originally form allow them to sometimes remain at pressures and temperatures that would melt other rock. 2. Pressure caused by large movements within the crust sometimes cause the in metamorphic rocks to align themselves in parallel bands. 3. During, rock is heated by nearby magma. 4. The effect of heat on rock decreases as the rock s from the magma. 5. When pressure builds up in rock which is located under other rock formations, occurs. 6. Regional metamorphism occurs deep in the Earth's COMPOSITION OF METAMORPHIC ROCK 7. Which of the following is NOT a property of an index mineral? a. forms only at a certain temperature b. forms only in sedimentary rock c. forms only at certain temperatures d. forms only in metamorphic rocks 8. Which of the following minerals is an example of an index mineral? a. calcite b. quartz c. chlorite. d. hematite 6
7 9. Which of the following is an example of a mineral that indicates that a metamorphic rock was formed at a great depth and under extreme heat and pressure? a. chlorite b. mica c. magma d. garnet 10. Which rock s name comes from the Greek words for changed and shape? a. metamorphic b. sedimentary c. fossiliferous limestone d. igneous 11. What kind of rocks are rocks in which the structure, texture, or composition have been changed? a. fossiliferous limestone b. igneous c. metamorphic d. sedimentary 12. What force or forces can create metamorphic rocks? a. cooling b. heat and pressure c. melting d. erosion TEXTURES OF METAMORPHIC ROCK 13. What do we call metamorphic rocks in which mineral grains are NOT aligned? a. foliated b. intrusive c. nonfoliated d. extrusive 14. The process in which a mineral changes composition during metamorphism called.. a. recrystallization b. nonfoliation c. foliation d. deformation 7
8 15. After sand stone has recrystallized, the new rock is called a. schist. b. gneiss. c. slate. d. quartzite. 16. By your own words explain the main two types of metamorphism : 8
9 Answer key: 1-magma formed and started to cool 2-igneous rock formed 3-more weathering and erosion factors 4-sedimentary rock formed 6- metamorphic rock formed 5-more heat and pressure 2- weathering erosion deposition Igneous rocks 1-b 2-a 1-magma 2 changing temperature, changing pressure, changing composition 3-the composition could be felsic or mafic, the mafic rocks solidified first after them the felsic solidified 1-a 2-c 3-d 4-b Complete the missing 1-intrusion 2-coarse grains 3-fine grains 4-faults 5-crust Sedimentary rocks 1- Sedimentary 2- Sedimentary rocks 3- Glue 4- Surface 5- Stratificati on 6- Sediments 7- Clastic 8- Chemic al 9- Organi c 10- Fossilifaro us lime stone 11- Coal 12- Weathering erosion deposition compaction and sementation Metamorphic rocks 1- Solid 2- Minerals 3- Contact metamorp hism 13- C 14- A 15- d 4- Far away 6- Crust 7- B 8- C 9- D 10- A 11- C 12- B 13- C 14- A 15- D 16- Contact metamorphism, controlled by heat, happen because of magma intrusion, while the regional controlled by pressure, happen deep down in earth crust or in the collision boundaries 5- Regional metamorph ism 9
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