1) Which one of the following is an artificial ecosystem ?  a) Forest b) Lake  c) Crop Field d) Pond 2) Flow of energy in an ecosystem is always  a) Unidirectional b) Bidirectional c) Multi directional d) No specific direction  3) What will happen if deer is missing in the food chain given below?  a) The population of lion increases b) The population of grass decreases . c) Lion will start eating grass d) The population of lion decreases and the population of grass increases 4) In the following groups of material which group(s) contain only non - biodegradable items ? a) Wood, paper , leather b) Polythene, Detergent , PVC c) Plastic, detergent, grass d) None of these 5) Organisms of a higher tropic level which feed on several types of organisms belonging to a lower tropic level constitute the a) Food Chain b) Ecosystem c) Ecological pyramid d) Food web 6) If a grass hopper is eaten by a frog , then the energy transfer will be from a) Producer to decomposer b) Producer to primary consumer c) Primary consumer to secondary consumer d) Secondary consumer to primary consumer 7) An ecosystem includes a) All the living organisms b) Non living objects c) Both living organisms and non living objects d) Nothing 8) What Will be the direction of energy in ( A deer is eaten by lion )   a) Producer to primary consumer b) Primary to secondary c) Secondary to tertiary d) All the above 9) The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about a) 1% b) 5% c) 8% d) 10% 10) Depletion of ozone is mainly due to a) CFCS Compound b) CH4 c) CO d) O2

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