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HOPE ACADEMY

AT

INDIA INDUSTRIAL MISSION

Half-Yearly Examination- 2011-2012

Class- VIII

Environmental Science

MM-80 Time:

I Fill in the blanks 1x 10 = 10

1. Trend of migration of rural people to the cities is called .2. Plant species in a particular region is called .3. The outermost layer of the earth is called .4. High growth rate of population is termed as .5. The process of forest to grow again is called .6. The depressions in the lithosphere are filled with water bodies is called .7. Are the major autotroph in aquatic ecosystem.8. Decrease efficiency of ecology of an area is termed as .9. In ................... top fertile layer of soil is removed.10.Animals eating upon both plants and animals are called ...................

II Answer whether the following statements are TRUE or FALSE. 1 x 10 = 10

1. Consumerism means rate of utilization of natural resources.2. Liquefied form of dead organic matter is called crude oil.3. Man made ecosystem is also called anthropogenic ecosystem.4. Recycling of solid waste is not proper method to save environment.5. Biosphere is not the living part of the earth.6. A chain in which there is eating and being eaten is called food chain.7. In the process of reforestation vast area of forest are cleared by men.8. The animals in particular habitat is called fauna.9. Conservation is not the preservation, protection of resources.10.Pond ecosystem is the classic example of ecosystem.

III Match the following 1 x 5 = 5

1. Herbivores a. Chlorofluoro Carbon2. Abiotic Component b. Decomposer3. Bacteria c. Green Plants4. Producer d. Eat only plants.5. CFC e. Climatic and edaphic factor

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IV Answer the following short question. 3 x 10 = 30

1. What is Natality and Mortality rate?2. What is Jhuming? Where it is mainly practised in India?3. What do you mean by food cycle?4. Name the three types of consumer in ecosystem?5. What do you understand by population growth?6. What are Chemoautotroph? Give one example.7. Give a schematic representation of food chain in pond ecosystem.8. What is fossil fuel? Give two examples.9. What is the problem of population growth on food?10.What are the impacts of population on land?

V. Answer the following long question 5 x 5 = 25

1. What is deforestation? What is its ill-effect? 2 + 32. Define ecosystem? Name two Flora and Fauna found in India 1 + 43. Write a note on impact of human population growth on eco-system of an area. 54. Briefly explain categories of the ecosystem. Give one example each. 3+15. Write short note on slum settlement. 5