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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
It is a microscope as microorganisms can be seen only through it.

Ans 2:

Class : Class 9
Electron Microscope

Ans 3:

Class : Class 8
barometer

Ans 4:

Class : Class 2
A Barometer

Ans 5:

Class : Class 8
IF IT IS SMALL THEN WE USE MICROSCOPE .WHEN IT IS VERY SMALL ORGANISM THEN WE USE ELECTRON MICROSCPOE

Ans 6:

Class : Class 2
Microscope

Ans 7:

Class : Class 10
Microscope for cell/microorganism observation and magnifying glass for bigger objects

Ans 8:

Class : Class 8
If it is small to see , we can use magnifying glass but if it is micro organism , we can see only through a microscope.

Ans 9:

Class : Class 8
compound microscope

Ans 10:

Class : Class 8
barrometer

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
As you see the chemical formula for water is H20, it contains molecules of hydrogen and oxygen

Ans 2:

Class : Class 2
hydrogen and oxygen

Ans 3:

Class : Class 2
Sodium Carbonate

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 2
A Barometer

Ans 2:

Class : Class 2
Microscope

Ans 3:

Class : Class 5
Microscope or barameter!? Who knows??!! I think it is microscope

Ans 4:

Class : Class 8
A barometer.

Ans 5:

Class : Class 6
Guys! Are you crazy? microscope is used to see microorganisms.barometer is used to measure the amount of rain.

Ans 6:

Class : Class 8
microscope

Ans 7:

Class : Class 8
Barometer

Ans 8:

Class : Class 5
dipleidoscope

Ans 9:

Class : Class 5
microscope

Ans 10:

Class : Class 6
Guys! Are you crazy? microscope is used to see microorganisms. The answer is weather camera.

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Vacuum

Ans 2:

Class : Class 2
Vacuum

Ans 3:

Class : Class 9
Through solids since the atoms are closely packed in them.

Ans 4:

Class : Class 8
VACCUM BUT LIGHT CAN

Ans 5:

Class : Class 8
vaccum

Ans 6:

Class : Class 8
vacuum

Ans 7:

Class : Class 8
In solids, especially when atoms are closely packed, metals.. Sound does travel in water and air with slow speed 1000, 300 m/s respectively whereas in metals with 3000 m/s.. And sound doesn't travel in vaccum at all..

Ans 8:

Class : Class 8
Air

Ans 9:

Class : Class 9
Vaccum

Ans 10:

Class : Class 8
First of all , many have answered it vaccum but it is absolutely wrong because sound can not travel in vaccum and most probably the correct answer will be solid.

Ans 11:

Class : Class 2
Water

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
hydrogen and oxygen.

Ans 2:

Class : Class 10
Sodium carbonate probably

Ans 3:

Class : Class 10
sodium carbonate

Ans 4:

Class : Class 9
Hydrogen,oxygen

Ans 5:

Class : Class 10
HYDROGEN AND OXYGEN

Ans 6:

Class : Class 2
Sodium Carbonate

Ans 7:

Class : Class 9
yes it is hydrogen and oxygen

Ans 8:

Class : Class 10
Hydrogen & Oxygen

Ans 9:

Class : Class 9
Hydrogen and Oxygen H2O

Ans 10:

Class : Class 2
hydrogen and oxygen

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