CHAPTER – 13: OUR ENVIRONMENT

VIGYAN

CHAPTER – 13: OUR ENVIRONMENT VOLUME – 1 SECTION-A: Multiple Choice Questions What is the ultimate source of energy which further flows through the food chain? (a) chemical energy (b) wind energy (c) Electric energy (d) solar energy Ans-(d) solar energy The flow of energy in an ecosystem is always: (a) unidirectional (b) bidirectional (c) cyclic (d) multidirectional Ans-(a) unidirectional Kitchen waste can be hygienically disposed of through (a) Dumping (b) Composting (c) Incineration (d) Recycling Ans-(b) Composting Which group of organisms are not constituents of same food chain? (a) Grass, lion, rabbit, wolf (b) Plankton, man, fish (c) Wolf, grass, snake, tiger (d) Frog, snake, eagle, grass, grasshopper Ans-(b) Plankton, man, fish The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis i…

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