QUICK QUESTIONS WITH ANSWERS FOR REFERENCE

What is Environmental Hazards.    (2 marks) It is event in nature that poses danger to people and the other living organisms Virus-free. www.avast.com

Benefits of optimum soil temperature. Increase the rate of bio chemical reactions hence breakdown of materials to form organic matter i.e. for every 10oC rate doubles. Activates soil micro – organism especially the useful bacteria for nitrogen fixation, Ensures maximum activities for bio chemical enzymatic reactions that bring about growth e.g. germination process. Virus-free. www.avast.com

State 3 methods that Kenya can use to conserve her energy.  (3 marks) Control energy imported levels Encourage package transport for people working in some areas or residing in the same place Construct and maintain good road to ensure less fuel consumption e.g Mombasa highway, Thika Highway e.t.c. Encourage people to use energy saving jikos Encourage people to use renewable sources of energy e.g. solar in carrying out campaigns Virus-free. www.avast.com

State three recent developments that have taken place in Kenya to improve communication of information. (3 mks) Liberalization on the press Expansion of telephone facilities Introduction of mobile phones, pager services, e.t.c Liberalization of postal services Licensing of more private radio stations and television stations Virus-free. www.avast.com

Form 4 Geography students carried out field study on mineral found in the Rift Valley State three objectives of their study. (3 mks) To find out the minerals found in Rift Valley To find out the uses of minerals in the Rift To find out the problems miners are facing List down three problems they are likely to come across. (3 mks) Un conducive weather e.g. very cold, rainy, windy Attacked by wild animals e.g. reptiles Breakdown of the vehicle Some students may fall sick Language barrier Inaccessibility of some areas Hostile people Virus-free. www.avast.com

Explain the  three effects of over-dependence of petroleum on the economy of oil importing countries.   (6 marks) Higher expenditure/foreign exchange/ spends more on importation Higher production costs/hence higher prices of manufactured goods Closure of industries which are not able to meet the increased cost of production coupled with increase in transport cost Slowed industrial growth as most industries depend on petroleum Economic recession in these countries as oil is necessary for all sectors of production Virus-free. www.avast.com

Explain three problems facing telephone as a means of communication in Kenya. (6 mks) Poor reception or disruption of natural hazards like rainfall of the telephone lines therefore discourages the use of this facility Mismanagement in the organization that provides telephone services has hindered its expansion Vandaliation of telephone equipment has rendered most of telephone services Unavailable to users Development of other more faster and efficient means of communication e.g. electronic mail, has reduced the use of telephone High cost of installation and maintenance of telephone lines limit the number of subscribers Virus-free. www.avast.com

State four factors that are necessary for the occurrence of minerals. (4 mks) Availability of necessary minerals to make mineral for e.g. deposits of vegetation and animal matter are necessary for formation of coal Presence of high pressure and temperature conditions to compact the raw materials and heat to form minerals Time during which the materials have been exposed to great heat and pressure Geological processes determine the minerals distribution e.g. vulcanicity and folding Virus-free. www.avast.com

State three cause of floods.   (3 marks) Deforestation therefore cutting down of trees in catchment areas exposes soil to agents of erosion and at the same time reduces water percolation Cultivation along river banks Blocked urban drainage systems Collapse of a dam Rise in the sea level Virus-free. www.avast.com

Name four forms of which minerals occur. (4 mks) Veins and nodes Beds and seams Weathering products Alluvial/placer deposits Virus-free. www.avast.com

Identify three environmental hazards caused by human activities.    (3 marks) Pollution Desertification Soil erosion Epidemics Virus-free. www.avast.com

Give reasons why Kenya has not been fully able to exploit her geothermal potential.   (4 marks) Inadequate capital Low level of technology in the exploitation of geothermal power Inadequate areas are located in remote areas/sparsely populated areas far from markets Inadequate skilled man power to harvest geothermal power Danger of land subsidence as kinetic water is withdrawn Virus-free. www.avast.com

Apart from nuclear energy name three other non-renewable sources of energy.   (3 marks) Natural gases Coal Petroleum Virus-free. www.avast.com

State three factors that hinder development of nuclear energy in many countries.   (3 marks) It is very expensive to construct a nuclear reactor Waste from a nuclear power plant is highly reactive and life threatening therefore difficult to dispose In case of being faulty can result to disastrous accidents The raw materials uranium is very rare Virus-free. www.avast.com

Name two areas in Kenya prone to flooding. (2 mks) Kano plains Lower Tana River The Bundalagi areas in Busia district Virus-free. www.avast.com

State three ways in which open cast mining affect the environment. (3 mks) it causes land dereliction which causes the land to lose its natural beauty. it causes the loss of productivity when loose soils, deficient of nutrients are left which cannot support agriculture mining exposing the land to agents of erosion hence rendering the land unproductive it leads to loss of biodiversity it causes harm to people and organisms when they drown in deep ponds caused open cast Virus-free. www.avast.com

Explain four ways in which mining contribute to the economy of Kenya. (8 mks) Provides raw materials for manufacturing industries Stimulates the development of transport and communication Opens up the remote areas through development e.g. water supply for drinking, construction of schools and hospitals Promotes settlement leading to growth of towns e.g. Magadi Generates employment opportunities where people earn income Promotes agriculture by providing market Lead to set up of other related industries Virus-free. www.avast.com

Why soil is important to crops. Supports plant life anchorage. Provides nutrients and water Contains organic matter, food for micro – organism Virus-free. www.avast.com

Students from your school carried out a field study on a flood prone area in your country.    State four reasons why the working schedule is very important in their study.   (4 marks) To ensure proper time management and reduce tendency of time wastage To ensure no important area will be inadequately covered It ensures that the one carrying out field study is on course It is a pointer as to how much time will be required for the study It gives a step by step plan of activities for the day It is a plan or timetable to be followed List three methods of data collection they are likely to use. (3 marks) Observation Interviewing people settled near the flooded areas Taking photographs Sampling Virus-free. www.avast.com

Explain four ways of combating floods in Kenya.    (8 marks) Construction of dams Building of dykes and artificial levees A forestation and reforestation Dredging and directing channels Virus-free. www.avast.com

Enhanced by Atikaschool.org Study the sketch map of the great lakes – St. Lawrence Study the sketch map of the great lakes – St. Lawrence a) Name   i) The part marked N (1 mk)       Quebec ii) The waterfall marked M          Niagara Falls iii) The lakes marked I, J, K, L (4 mks) I    Lake Superior J     Lake Michigan K    Lake Huron L    Lake Ontario Explain five ways in which the great lake of St. Lawrence Seaway has contributed to the economy of Canada and USA. (10 mks) The seaway has created employment opportunities in transport industry thus raising the living standards of people The Seaway is tourist attraction which generates income in the region Tariffs charges earns the country income It provides easy navigable means of transport for both imports and exports. This encourages internal and international trade It has led to the gr

Give characteristics of plantation agriculture in Kenya (3 mks) Some plantations are foreign own e.g. Delmont Many crops take several years to mature There is heavy capital outlay There is scientific management Concentration on one crop e.g. tea, coffee Crops mainly grown on large estates e.g. more than four hectares Virus-free. www.avast.com

State three courses of urban rural migration. (3 mks) Retirement from job Transfer on job Insecurity in towns Education purposes/learning Retrenchment from one's job in town Religion Virus-free. www.avast.com

Give two reasons for rapid population growth in Kenya.. Improved nutrition hence balanced diet Improved medical facilities which has reduced mortality Some religions/Christian churches disapprove the use of artificial birth control methods Increases cases of early pregnancy in girls Provision of better social amenities Virus-free. www.avast.com

Possible reasons for the decline in the number of tourists since 1997 (4 mks) High degree of insecurity caused by 1997 Likoni clashes in Mombasa, a major tourist destination in the country. Tourist attack like in 1998 bombing in Nairobi and other attacks directed to tourist resorts The tense atmosphere preceding the parliamentary elections in 1997 Poor transport and communication after massive destruction caused by 1997 Elnino rains Negative travel advisory made by some governments cautioning their citizen against visiting Kenya Virus-free. www.avast.com

Definition of ecotourism This is tourism with emphasis on the conservation of the environment. Virus-free. www.avast.com

Steps that the Kenya government has taken to promote tourism in Kenya.  (5 mks) The government has provided transport and communication necessary for tourism to make the attraction sites accessible The Kenya government manages and conserves wildlife through establishment of national parks and games reserves The government has established the Ministry of Tourism which formulates and implements policies that ensure promotion of tourism in the country The government encourages local and foreign investors to invest in coastal hotels so as to attract more tourists Kenya has undertaken vigorous publicity campaigns abroad. She has promotion offices in major tourist sources of the world. The government has established a body which lends to and advises the investors in tourism industry i.e. the Kenya Tourism Development Cooperation (KTDC) The governm

​KCSE PAST PAPERS CHEMISTRY PAPER 1, 2 AND 3 QUESTIONS, ANSWERS-MARKING SCHEMES AND REPORTS ​KCSE PAST PAPERS 1995 CHEMISTRY PAPER 1, 2 AND 3 QUESTIONS, ANSWERS-MARKING SCHEMES AND REPORTS https://www.atikaschool.org/kcsepastpapersbysubject/kcse-past-papers-1995-chemistry-paper-1-2-and-3-questions-answers-marking-schemes-and-reports ​KCSE PAST PAPERS 1996 CHEMISTRY PAPER 1, 2 AND 3 QUESTIONS, ANSWERS-MARKING SCHEMES AND REPORTS https://www.atikaschool.org/kcsepastpapersbysubject/kcse-past-papers-1996-chemistry-paper-1-2-and-3-questions-answers-marking-schemes-and-reports ​KCSE PAST PAPERS 1997 CHEMISTRY PAPER 1, 2 AND 3 QUESTIONS, ANSWERS-MARKING SCHEMES AND REPORTS https://www.atikaschool.org/kcsepastpapersbysubject/kcse-past-papers-1997-chemistry-paper-1-2-and-3-questions-answers-marking-schemes-and-reports ​KCSE PAST PAPERS 1998 CHEMISTRY PAPER 1, 2 AND 3