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Subject :NSO    Class : Class 7

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The theory which states that background radiation caused after the Big Bang explosion was the cause of formation of stars is called the cosmos theory.

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Subject :NSO    Class : Class 7

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NaOH

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The molecular formula for sodium hydroxide is NaOH

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NaOh

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NaOH

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NaOH

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Class :
NaOh

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Abhishek from New Vision the olympiad school, KHAMMAM
Class : Class 7
NAOH is the answer.

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from ,
Class :
NaOH

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Sudip from DPS Gurgaon, New Delhi
Subject :NSO    Class : Class 4

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Sudip from DPS Gurgaon, New Delhi
Class : Class 4
The full of IAU is International Astronomical Union.

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Class :
The full form of IAU is International Association of Universities

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from ,
Subject :NSO    Class : Class 7

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gaurang gupta from mount litra zee school, uttar pradesh
Class : Class 8
a relationship in which two organism live together and take benefit of each other

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A relationship in which two plants help each other to survive.

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Symbiotic relationship is the process where organism help each other.They cannot live without each other

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UVAIS ZUFAR from DON BOSCO SCHOOL OF EXCELLENCE, Chennai
Subject :NSO    Class : Class 5

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Tigers are becoming extinct as poachers are hunting them and when we cut down forests their natural habitat are also becoming less.They need a vast area to hunt.

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Daksh Rajesh Lolienkar from Doha Modern Indian School, Doah Qatar
Class : Class 5
Tigers are becoming extinct due to poaching and disturbing their natural habitat

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monishajv2006@gmail.com from manan vidya, Ranchi
Class : Class 5
Because they are hunted by hunters for food and other purposes

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Soundharya from ISWK, Muscat
Class : Class 8
We humans destroy the habitat of tiger and poachers hunt them for their skin,nail and teeth.This is the reason for tiger becoming extinct.

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Tigers are becoming extinct due to poaching and we are disturbing their natural habitat.Tigers are also a very endangered species of animal.They are commonly found in India,China and Bhutan.

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UVAIS ZUFAR from DON BOSCO SCHOOL OF EXCELLENCE, Chennai
Subject :NSO    Class : Class 5

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monishajv2006@gmail.com from manan vidya, Ranchi
Class : Class 5
Butterflies suck nectar using their tube like mouth.

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praveen prabhu from private international english school, abudhabi
Class : Class 5
It is called a proboscis and is a long flexible tube like straw that is the butterfly's tongue. The butterfly uses the proboscis to drink nectar and when it is not in use it curls back into a spiral.

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Soundharya from ISWK, Muscat
Class : Class 8
Butterflies have the taste sensor on their feet.Thus they suck nectar through their feet.

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butterflies suck nectar with the help of proboscis

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UVAIS ZUFAR from DON BOSCO SCHOOL OF EXCELLENCE, Chennai
Subject :NSO    Class : Class 5

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Jairaj Singh Basur from Vivek High School, Chandigarh
Class : Class 8
Echolocation is to use the echo( vibrations of sound bounced off by objects ) to locate certain items. Bats use echolocation to travel.

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Echolocation is the using of echo to locate object or find a prey.Animals like Bat sends vibrations that bounce off from the body of their prey.Then they with the help the vibrations they can locate food easily.

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UVAIS ZUFAR from DON BOSCO SCHOOL OF EXCELLENCE, Chennai
Subject :NSO    Class : Class 5

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People who do not have houses, they roam around on place and another.

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RITAJA MISHRA from DPS NORTH KOLKATA, Kolkata
Class : Class 8
When early human beings noticed that they are not getting sufficient amount of food to survive, they started moving from one place to another in search of food and shelter and they were called nomads.

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Soundharya from ISWK, Muscat
Class : Class 8
Nomads are people who live in hilly and mountain regions.

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early man are called nomads i.e move from one place to another.

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NOMADS ARE THOSE PEOPLE WHO MOVE FROM ONE PLACE TO ANOTHER AND DO NOT HAVE A PERMANENT HOUSE

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Mohit from Carmel High school Gadchiroli , Gadchiroli
Subject :NSO    Class : Class 8

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STEEL

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Anidroid ,Aniruddha from Modern DPS, Faridabad
Class : Class 8
Aluminium

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Nirdesh Prajapati from K V No. 3, Jaipur
Class : Class 8
in the hardest metal Chromium

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swayam agrawal from Udgam school for children, Ahmedabad
Class : Class 8
iron or steel

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Aishwarya Dwivedi from St. John's School, Marhauli, Varanasi
Class : Class 9
Steel is an alloy....and he asked metal. I guess the answer is Aluminium.

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Class :
Aluminium i.e. 6420m/s

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in diamond

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Daksh Rajesh Lolienkar from Doha Modern Indian School, Doah Qatar
Subject :NSO    Class : Class 5

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thermal conduction was originally called as diffusion

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UVAIS ZUFAR from DON BOSCO SCHOOL OF EXCELLENCE, Chennai
Class : Class 8
conduction -the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts. diffusion -a reflection or refraction of light or other electromagnetic radiation from an irregular surface or an erratic dispersion through a surface; scattering.

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Soundharya from ISWK, Muscat
Class : Class 8
The transfer of heat from one substance to another by direct contact is called conduction or diffusion.

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