I state three findings they are likely to have come

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(i)State three findings they are likely to have come up with.(3mks)(ii)Give three advantages of studying rivers through field work210 |P a g e
TOPICAL GEOGRAPHY K.C.S.E 2012 to 2015CHAPTER 7ROCKS AND MINERALS1.(a) Describe the following characteristics of minerals(i)Colour(2mks)(ii)Cleavage(2mks)(iii)Hardness(2mks)(b)(i)Give two types of igneous rocks(2mks)(ii)Explain three conditions necessary fro the growth of coral polyps(6mks)(c)State four uses of rocks(4mks)(d)You are planning to carry out a field study on the rocks within your school environment(i)Give two secondary sources of information youwould use to prepare for thefield study(2mks)(ii)State why you would need the following items during the field study:A fork jembe(1mk)A polythene bag(1mk)(iii)Suppose during the field study you collected marble, sandstone and granite,classify each of these samples according to its mode of formation(3mks)2.(a)State two characteristics ofsedimentary rocks(2mks)(b)Give two examples of chemically formed sedimentary rocks(2mks)3.a)Name the type of rocks which results from the metamorphism of:(i)Granite(ii)Clay(2mks)b)Give two reasons why sedimentary rocks are widespread in the coastal plain of Kenya.(2mks)4.(a)(i)What is a rock?(2mks)(ii)Describe three ways through which sedimentary rocks are formed-Mechanically formed-Organically formed-Chemically formed(6mks)(b)Describe two process through which sedimentary rocks changer into metamorphicrocks211 |P a g e
TOPICAL GEOGRAPHY K.C.S.E 2012 to 2015(c)Give an example of each of the following types of igneous rocks(i)Plutonic rocks(1mks)(ii)Hypabyssal rocks(1mks)(iii)Volcanic rocks(1mks)(d)Suppose you were to carry out a field study of rocks within the vicinity of your school(i)Name three secondary sources of information you would use to prepare for thefield study(3mks)(ii)State four activities you would carry during the filed study(3mks)(iii)State three problems you are likely to experience during the field study(3mks)5.(a)Differentiate between plutonic rocks and volcanic rocks(b)Describe how lava plateau is formed(c)(i)Name three volcanic features found in the rift valley of Kenya(ii)Explain four negative effects of vulcanicity in Kenya(d)You intend to carry out a field study of a volcanic landscape(i)State four reasons why it is necessary to conduct a reconnaissanceof the area of study.(ii)During your field work, you intend to study volcanic rocks, statewhy you would need the following items6.(a)State two main conditions that influencethe characteristics of igneousrocks.(2mks)(b)Write down three characteristics of sedimentary rocks.(3mks)(c)Name two examples of organic sedimentary rocks and where found in Kenya.(2mks)(d)Name four examples of metamorphic rocks and state the original rock from which eachwas formed.(4mks)(e)Describe the importance of rocks to human activities.(5mks)7.(a)State with examples three classes of mechanically formed sedimentaryrocks.(6mks)(b)Differentiate between regional metamorphism and contact metamorphism.

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