Question 1
- State three reasons why we need to conserve and manage the environment
- Give two ways used to control the effects of air pollution
Answer
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- For future generations.
- For food supply.
- For maintenance of genetic resources.
- For protection of water catchment areas -
- Using vehicles that have more efficient engines
- Use of bicycles/ walking instead of driving.
- Afforestation/reforestation /agro forestry; trees purify the air
Question 2
- Briefly describe how minerals occur in veins and lodes
- State three problems of land dereliction
Answer
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- Minerals occur in crevices/cracks or faults.
- If they occur in small quantities in cracks or crevices then they are referred to as veins while those occurring in large quantities are referred to as lodes -
- Ugliness; All the natural beauty of the landscape has been lost.
- Health hazard; Mineral exploitation can create a variety of hazards e.g open pits becomes breeding ground for mosquitoes. People and livestock can fall into the pits and injure themselves.
- Lost productivity; The soil left behind after mining may not be able to support any meaningful economic activity.
Question 3
- What is containerization.
- State three reasons why the government is encouraging the use of pipeline in the transportation of oil
Answer
- Is the packaging of goods in standardized containers designed for use in transportation
- - It is cheaper than other means. - It is faster. - It is safer. - It is a way of decongesting traffic on the roads.
Question 4
- What is population census
- State three reasons why countries conduct population census
- Give two reasons the Kenyan government has taken to check high population growth rate
- Give two reasons why hardwood tree species are in danger of extinction in Kenya.
Answer
- Is the enumeration of the entire population of an area and the compilation of the demographic, social and economic information of the population being enumerated at a given time
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- To determine the composition of the population.
- To know the trends and levels of mortality and fertility.
- To plan for provision of basic facilities.
- To aid in making decisions regarding the creation of new administrative units. -
- Introduction of national family planning programme.
- Creation of national council for population and development.
- Introduction of adult education programme to check illiteracy levels
- Creation of public awareness through mass media. -
- The high demand for hardwood has led to over exploitation.
- Population pressure on the land has led to increased cutting of trees to provide land for farming.
- The hardwoods take a long time to mature and this does not match the rate at which they are being cut.
Question 5
- What is urbanization?
- State two factors that have led to the development of Mombasa as a major sea port in the region.
Answer
- Is a process whereby an increasing population in a country settles in towns. OR it is the growth of a town in number / population and size. OR it is the process by which population is transferred from rural based lifestyles to urban base life styles
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- Deep sheltered harbor.
- Fine weather throughout the year.
- Larger hinterland.
- Large volume of water.