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Biological Sciences
50
Modern Materials
21
Atomic Structure
87
Energy Resources
43
Elements and Substances
76
Plant Photosynthesis and Respiration
52
Space and Solar System
230
General Science for Class 6
1155
General Science for Class 7
2197
General Science for Class 8
0
Basics of Electricity
28
Show/Hide Answers
Atoms and Atom Model
If the mass of protons and neutrons is 1, then the mass of electron is
2
2-Jan
4-Jan
1/1890
Author:
rikazzz
Comment
Heat Transfer
The name of the scientist who invented thermos is
John Dalton
James Dewar
John Edison
James Blake
Author:
rikazzz
Comment
Electric Circuits and Currents
Huge magnets are used to carry
scrap iron and steel
current in the circuit
ions in the breakers
airplanes from one airport to another
Author:
rikazzz
Comment
Elements and Compounds
A ductile element which is a good conductor of electricity is called
copper
rubber
glass
sand
Author:
rikazzz
Comment
Human Transport System
Carbon dioxide and other toxic waste is carried into blood by
red blood cells
white blood cells
plasma
platelets
Author:
rikazzz
Comment
Investigating Space
The sun is a glowing ball of hot gases which rotates in
space
earth
ovals
circles
Author:
rikazzz
Comment
Electric Circuits and Currents
A magnet may attract or repel by
another magnet
electric current
resistor
dynamo
Author:
rikazzz
Comment
Atoms Molecules and Ions
One carbon atom and one oxygen atom are combined together to form a molecule of
oxygen
water
carbon dioxide
carbon monoxide
Author:
rikazzz
Comment
Simple Chemical Reactions
The conservation of mass is obtained when the total mass of reactants is equal to total mass of
products
molecules
protons
atoms
Author:
rikazzz
Comment
Dispersion of Light
If a ray of light enters the surface of diamond at an angle of 24 Degree or more, the light would
end
reflect back
refract at a greater angle
totally internally reflect
Author:
rikazzz
Comment
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