8th class Science Chapter 1 online mcq test with answers for chapter 1

Top Scorers Of Chapter 1 "General Science 8th Class English Medium Chapter 1 Online Test" MCQ`s Test

Sr.#	Question	Answer
1	Which factor is responsible for ecological imbalance.	A. Over hunting B. Change in water supply C. Migration D. All these
2	The feeding level of an organism in an ecosystem is called.	A. Food Web B. Food chain C. Trophical level D. Secession level
3	The organisms upon whihc a redator feeds are called.	A. Prey B. Carnivores C. Herbivores D. Producers
4	Half of the increase in atmospheric carbon dioxide concentrations in the last.............. years has occured since 1980	A. 100 B. 200 C. 300 D. 400
5	The phenomenon which doe snot lead to global warming.	A. Green hous effect B. Ozone depletion C. Deforestation D. Photosynthesis
6	------------- gas is released when dead organisms are decomposed by the decomposers.	A. Oxygen B. Carbon dioxide C. Nitrogen D. Hydrogen
7	Carbon cycle and ............. cycle are teh processes in whihc these minerals circulate between the organisms and the environment.	A. Hydrogen B. Iodine C. Oxygen D. Nitrogen
8	Energy of ............ is trapped as chemicla energy by producers.	A. Moon B. Atom C. Sun D. Earth
9	The energy of the Sun in traped as chemical energy by.	A. Tertiary consumers B. Primary consumers C. Producers D. Secondary consumers
10	During the combustion of fossil fuel. Which gas is ener the atmosphere.	A. Nitrogen B. Oxygen C. Carbon di oxide D. Hydrogen