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2) Which one of the following makes the soil fertile?a) Pesticides b) Humus c) Water3) The main cause behind the deforestation is :-a) Pesticides b) Urbanization c) Crop Rotation4) The air breadth out is rich in :-a) Oxygen b) Carbon Dioxide c) Nitrogen5) Which of the following plant has root nodules that bear bacterial cells?a) Carrot b) Turnip c) Pea6) A gas that does not burn and helps put out fire:-a) Oxygen b) Carbon Dioxide c) Nitrogen7) Condensation is a process of changing water into_________.a) Water vapour b) water c) Ice8) An example of a wedge is :-a) Jack b) Nail c) Blade9) How can we increase the speed of doing work?a) By applying more & more workb) By working hardc) By using a machine10) Big size stone can be lifted by using:-a) An Inclined Plane b) A Wheel c) A Lever |
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Answer» Answer: 2. Humus 3.crop rotation 4.carbon DIOXIDE 5.laguminious plant 6.nitogen 7.vapour 8.nail 9.by WORKING hard 10.an INCLINED plane mark me as BRANLIST |
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