Part – A: I. Answer all the following questions : 1. Rock type: i) Igneous rock ii) Sedimentary rock iii) Metamorphic rock Example: a) Limestone b) Schist c) Syenite Above are the name of rock types and their examples. Match the rock type with their correct example by selecting an option below.
a.i – c, ii – b, iii – a b.i – a, ii – b, iii – c c.i – b, ii – a, iii – c d. i-c, ii-a, iii-b
2. ** Rock gets formed either by magma or lava ** The process involved is cooling and consolidation ** It is also found in Karnataka Based on the above characteristics identify the rock a. Sedimentary rock b. Igneous rock c. Metamorphic rock d. Mechanical rock
3. Sediments: Sand, gravel, clay and silt. Arrange the sediments in their increasing grain size order. a.Gravel—>sand—>silt—> clay b.Clay—>silt—>sand—>gravel c.Silt—>sand—>gravel—>clay d. Sand—>silt—>gravel—>clay
4. Assertion (A): The rocks occurring in the epizone are slate and chlorite schist. Reason (R): Becauseepizone occurs near the earth’s surface and is characterized by low temperature and strong shear stress. a.(A) is true, but (R) is false b. (A) is false, but (R) is true c. Both (A) and (R) are true and (R) is the correct explanation of (A) d. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
5. Suppose a person was send for a geological mapping of a particular area and was told to identify the oldest rock formation in that area. How would he proceed? a.Identifying the sequence of rock deposition b.Identifying the structural changes c.Identifying the grain size variation d.Identifying the mineral composition
II. Fill in the blanks by selecting the correct answer given below : (Answer: Granulose, Paleontology, Igneous, Joint, Clastic, Metamorphic) 6. Gneiss is an example of ___________ type of rocks. 7. Mechanically formed sedimentary rocks are also called as __________ rocks. 8. Marble shows ___________ structure. 9. Fracture in a rock along which there is no displacement is called ___________ 10.The branch of geology which deals with the study of fossils is called __________
III. Match the following: 11. Sill a) Agent of metamorphism 12. Limestone b) Highest point of fold 13. Temperature c) Plant fossil 14. Crest d) Sedimentary rock 15. Ptillophyllum e) Concordant f) Discordant
IV. Answer all the following questions : 16. Difference between lava and magma. 17.Which lava has high viscosity? 18. Mention one difference between true dip and apparent dip. 19. Given below is the figure of rock bed’s deposition. Identify the older rock bed and younger rock bed based on the sequence of bed deposition. 20. What do you call the vertical plates extending from margin towards the center in corals?
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