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

General Science 8th Class English Medium Chapter 1 Online Test

Sr. #	Questions	Answers Choice
1	Energy of ............ is trapped as chemicla energy by producers.	Moon Atom Sun Earth
2	Which is the solution of environmental problems.	Reducing pollution Plantation Protection of endangered All these
3	Half of the increase in atmospheric carbon dioxide concentrations in the last.............. years has occured since 1980	100 200 300 400
4	The poisonous and harmsful substances which make the air unfavorable for life are called.	Solid pollutant Air pollutant Water pollutant Acid Rain
5	Ozone is a layer of gases in ............. atmosphere of the Earth.	Upper Lower Middle Inner
6	Green house gases is	Carbon di oxide Methane Oxides of nitrogen All these
7	A symbiotic relationship in whihc both speciesl get benefit is called.	Commensalism Hebitate Mutualism Symbiosis
8	Which factor is responsible for ecological imbalance.	Over hunting Change in water supply Migration All these
9	A relationship where two species live togetehr closely is called.	Mutualism Commensalism Symbiosis Hebitate
10	The organisms upon whihc a redator feeds are called.	Prey Carnivores Herbivores Producers