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Subject :NSO    Class : Class 4

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Class : Class 4
Schuler Skaats wheeler has invented fan. Nikunj Bansal

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 5

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Class : Class 8
kilauea volcano

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 5

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Class : Class 5
We cannot walk on ice because of reduced frictional force.Ice is also very smooth. Smooth surfaces have reduced friction while rough surfaces have a lot of friction.Friction is also known as a necessary evil because it is very necessary in life but causes harm in form of wear and tear. It also produces heat. Some good examples of friction are: a) rubbing of hands b) ball stops after moving for a while Ice skaters have special blades for skating on ice. There skates have blades that cut the ice and make a strong grip to let them skate.

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Class : Class 6
We slip on ice because of less friction

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Class : Class 5
absence of frictional force

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Class : Class 5
less friction

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Subject :NSO    Class : Class 5

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Class : Class 6
The pull of the Earth is called gravitational force. eg are the coming down of a ball

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Class : Class 5
Whenever we throw a ball up in the air, it falls back to the ground . This is because of a force called gravitational force or gravity.This is the force in which all the objects are pulled towards the earth. Sir Isaac Newton was the first man to discover it.

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Class : Class 8
A thrown up ball falling back to us.

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Subject :NSO    Class : Class 5

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Class : Class 7
Egg beater,see-saw and bottle opener

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Class : Class 5
There are mainly six types of simple machines a) wheel and axle b) inclined plane c) wedge d) lever e) pulley f) screw

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Class : Class 5
1] Wedges 2]Inclined Plane 3]Levers 4]Pulley 5]Screws 6]Wheel and axels

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Subject :NSO    Class : Class 6

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Class : Class 7
Invent means "create or design [something that has not existed before ]". According to the recent history Vasco da Dama was the first European to reach India by sea linking Europe and Asia for the first time ocean route , was accomplished on his first voyage to India .[1497-1499] , so you can say that he discovered India .

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Class : Class 6
Vasco de Gama first named India.

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Class : Class 7
You cant INVENT a place.You can discover it.

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Subject :NSO    Class : Class 7

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Class : Class 8
Ferrel's law is the law that wind is deflected to the right in the Northern hemisphere and to the left in southern hemisphere.

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Subject :NSO    Class : Class 5

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Class : Class 6
Bryophyllum

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Class : Class 5
Bryophyllum

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Class : Class 5
broyphyllum

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Class : Class 5
Bryophyllum

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Class : Class 7
Bryophyylum

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