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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
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Atoms and Atom Model
Strong radioisotopes can be used to destroy
organs
bacteria
viruses
cancer cells
Author:
rikazzz
Comment
Atoms and Atom Model
The orbits on which electrons revolve around the nucleus are called
layers
shells
subshells
atom
Author:
rikazzz
Comment
Atoms and Atom Model
Actually, the particle that makes difference in atoms is
neutron
proton
electron
photon
Author:
rikazzz
Comment
Sound Waves
“Ultrasound” can
break up kidney stones
destroy the kidney stones
stimulate the growth of kidney stones
clot blood in the kidneys
Author:
rikazzz
Comment
Investigating Space
A gigantic collection of stars, dust and gases held together by gravity is known as
solar system
galaxy
cluster
comet
Author:
rikazzz
Comment
Dispersion of Light
As the light moves from one medium to another, its
amplitude changes
speed changes
frequency and wavelength change
wavelength changes only
Author:
rikazzz
Comment
Investigating Space
At night the group of stars which appears in the sky, is called
horoscope
constellation
prominence
ptolemy
Author:
rikazzz
Comment
Atoms and Atom Model
The nearest shell to a nucleus is called
shell A
shell K
shell S
shell C
Author:
rikazzz
Comment
Investigating Space
The diameter of each dish of separate aerial telescope is
20m
25m
30m
35m
Author:
rikazzz
Comment
Atoms and Atom Model
Uranium-238 which is an isotope of uranium, is
stable
radioactive
complete
decayed
Author:
rikazzz
Comment
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